PLEASE READ!
School of the American Rifle Student,
Please read this document thoroughly. It tells you just about everything you need to know about attending a School of the American Rifle AR-15 Technical Class. This information is for you to dissect as you see fit. We want to give you every bit of information possible, so please don’t get overwhelmed. If you find any errors, please let us know and we will gladly thank you for helping us correct our errors.
The AR-15 or AR-15 Parts you bring to a Class MUST be Direct Impingement. Blowback or External Gas Piston AR-15’s are NOT permitted. You may bring an assembled AR-15 instead of a box of AR-15 parts. We use that opportunity to teach other Students about proper disassembly.
COVID-19 PRECAUTONS: Be sure to bring a face mask while traveling. Some Airlines, Trains, and Hotels may require it. If someone asks you the purpose of your travel/lodging, “professional development” is always a good response. If you mention firearm training, you may be treated poorly. We do not require Students wear a face mask during Class. Please feel free to wear one if you have that preference.
Your AR-15 build MUST be pre-approved before attending a Class. Once you make your final payment, email us a detailed parts list as soon as possible. If parts are used, please make note of it. We do this to ensure we have all of the tools and equipment necessary for you to complete your AR-15 Build. The secondary reason is to do a summary legal review to ensure your AR-15 Build and travel plans do not violate Maryland Law. This is not a test to deny you based on the parts you choose. Some of my Students bring $300.00 AR-15 Parts Kits, and some bring $30,000.00 Registered M-16’s, and anything in between. We don’t not care who makes your AR-15 or the components you select. If the parts gauge out and are assembled right, then your AR-15 Build will be reliable. Be sure to transport ALL of your AR-15 build components in a well-padded container so no items are lost or damaged during travel.
We do not make parts recommendations so please do not ask for advice on what brand to buy. We will answer technical questions from our Students, but not brand related questions.
You can bring up to 3 AR-15 lower receivers to the Class for inspection and gauging. Due to time restrictions you can only build ONE AR-15 Lower Receiver. Having multiple Lower Receivers allows you to have backups in case we discover a problem that can’t be repaired. It will also allow you to “certify” other Lower Receivers that you wish to assemble when you return home. If you are unable to do this, please don’t worry.
You can bring up to 3 AR-15 Bolt Carrier Groups to the Class for inspection and gauging. Due to time restrictions we can only make corrections or modifications to ONE Bolt Carrier Group. Having multiple Bolt Carrier Groups allows you to have backups in case we discover a problem that can’t be repaired. It will also allow you to “certify” other Bolt Carrier Groups that you plan to use when you return home. If you are unable to do this, please don’t worry.
If possible, we encourage Students to bring TWO Barrels to Class. There have been a few isolated incidents where Students only brought one Barrel and encountered serious issues that left them unable to complete their Build. We do allow Students to ship us their Barrel and Bolt Carrier Group ahead ahead of their Class so we can do a preliminary inspection & gauging. If the parts pass, they will be placed at your bench when you attend your Class. We do not contact you unless there is a problem. We do not ship them back to you before Class unless there is a problem. This must be done at least 3 weeks before the Class. If you don’t want to bring two Barrels, and you don’t want to ship me your Barrel and Bolt Carrier Group, it is possible that you may not leave with an assembled Upper Receiver. We leave this decision up to you.
If you need to have your Muzzle Device Pinned and Welded, we have TWO Options.
Option 1: We can Pin & Weld your Muzzle Device in Class. If we Pin & Weld in Class, it will be a functional weld, but it WONT win a beauty contest. There is no additional fee to take this route.
Option 2: I can send your Upper Receiver and Muzzle Device to DWilson Manufacturing for a Pin & Weld Job. David Wilsons Pin & Welds are the best and WILL win a beauty contest. There IS a $60.00 fee for this route.
Note: If you have an assembled Upper Receiver and the Muzzle Device is already Pinned & Welded, we can leave it as is unless you need to change the Front Sight Base/Gas Block or Handguard/Rail. If we have to remove a Pinned & Welded Muzzle Device, it could lead to, or uncover damaged Muzzle Threads. Plan accordingly.
If you are flying DO NOT try to bring Ammunition, Firearm Receivers, Silencers, Optics, or ANY Firearm Parts in your carry-on luggage. Firearms MUST be checked/declared with the Airline and stowed in checked baggage part of the aircraft. The hard case and locks you transport your firearm must be TSA/Airline approved. Please read the TSA Regulations and understand them well before traveling with a Firearm, Ammunition, and Firearm Components. It does not hurt to print the Airline or TSA Regulations and have them in case you encounter a troublesome TSA Agent or Airline Ticket Agent.
If you are flying to a Class, or back home, and your flight is routed to NY, IL, CA, RI, HI, MA, NJ, D.C., CT, or any Antigun State, do NOT take possession of your checked Firearm or Firearm accessories if they are banned in that particular State/District. If you have anything that is restricted or banned, make the Airline hold and handle your Checked Firearm, Ammunition, & Accessories until you are rerouted. In some States/Districts simple possession of a Firearm, AR-15, AR-15 Lower Receiver, Ammunition, Standard Capacity Magazines, or N.F.A. Device may be an arrest able offense.
When you arrange for transportation and lodging we suggest planning on leaving the day after Class ends in case Class runs over its estimated end time. In some instances, our 2 Day Classes have ended at midnight or later, but we do strive to be done by 8 P.M.
Classes held during the winter months can sometimes occur when there is inclement weather. Classes will NOT be cancelled unless the roads are closed by the State of Maryland or there is a travel ban due to national or state emergencies. In the event that roads are closed or a travel ban instituted, we will reschedule the Class. There are no refunds offered in these rare instances, but we will offer a rescheduling option.
We recommend that ALL students consider purchasing Travel/Trip Insurance. If possible, book refundable Transportation and Lodging. We are not responsible for any Travel, Transportation, Medical, or Lodging Issues. We DO NOT make Airlines, Rental Car, or Hotel recommendations. We do suggest making Rental Car reservations as soon as possible. There is a national shortage on Rental Cars and some Students have reported having problems getting a rental when they try to reserve at the last minute.
The two closest Airports to our Class location are Philadelphia International and Baltimore/Washington International. Of the two, we suggest flying into Philadelphia International and driving to Newark Delaware for lodging. Newark Delaware is only a few miles from our shop in Maryland, and does not have restrictive AR-15 Laws or CCW Laws so many Students choose to stay in Delaware.
If you decide to travel to or stay in Delaware, you can NOT bring a Sound Suppressor/Silencer since they are not legal there. We suggest you completely avoid New Jersey, New York, and Washington D.C. if your plan of travel or GPS tries to direct you through those places.
We do keep a supply of AR-15 parts for purchase in the event you forget or lose something, or if something fails inspection and gauging. Some AR-15 Parts are proprietary and we cannot always guarantee we will have parts if you forget something, or if something is lost or damaged. We do not sell or transfer AR-15 Lower Receivers. Plan accordingly.
We place an Emergency Medical/Contact Form at each Student Workbench. The Form lists your emergency medical contact information, medications, and any medical issues you might have. In the event of a medical emergency, we want to give first responders the most accurate information about you and have a way to contact your loved ones. This information can assist us in returning your firearm to your loved ones if necessary. The Emergency Medical/Contact Form stays on your Workbench and will NOT be viewed by any Students or School of the American Rifle Staff unless there is a Medical Emergency. We DO NOT retain the Form, and we instruct Students to take the Form with them when Class is complete. The Emergency Medical/Contact Form is 100% OPTIONAL.
We do have a MANDATORY Release Waiver/Hold Harmless/NDA placed at each Workbench. Your signature is REQUIRED for this Form. Failure to sign will forfeit your ability to take the Class. There are no refunds if you refuse to sign the Waiver. If you would like to view the Waiver, follow the link below.
Mandatory Release Waiver
Class Prices:
Keep an eye out for class announcements. They will have the prices listed. Classes are always announced first in our SOTAR Society community.
Always Check there first.
DONT SEND PAYMENT UNTIL YOU RECEIVE PAYMENT DETAILS!
Please be sure to use the exact information above for making out your Payment and addressing your Payment. Put your Class Date on the Payment or include a note with the Class Date in the envelope. DO NOT make Payment out to SOTAR or Chad Albrecht.
Your Class Seat is NOT guaranteed until we receive your payment for Balance Due. Payments must be received no later than 30 days after the Non Refundable Deposit is paid. When you make Payment your name and address MUST match your Non Refundable Deposit and your Online Registration Form. You can NOT transfer your seat to another person/s without our prior authorization.
All School of the American Rifle AR-15 Technical Classes are held at 82 Augusta Drive, Elkton, MD 21921 unless noted. Please be sure to bring the required items, and DO NOT arrive before 7:40 A.M.
School of the American Rifle Classes are PRIVATE events and are NOT open to the Public.
-If you are attending our 2 Day AR-15 Combined Master Armorer & Build Class, we begin Day 1 at 8 A.M. and end at 8 P.M. We begin Day 2 at 8 A.M and class ends at 8 P.M. *Sometimes MUCH Later*
-If you are attending our 1 Day AR-15 Armorer Class, we begin at 8 A.M. and ends at 8 P.M. *Sometimes Later*
-If you are attending our 1 Day AR-15 Master Build Class, we begin at 8 A.M. and ends at 10 P.M. *Sometimes Later*
We will email Registered & Paid Students photographs of the Class Location and Class/Shop Entrance to make finding us easier. These instructions will also include parking instructions. Please do not park on or front of any property that is not Owned by School of the American Rifle. If you park in an unauthorized place your vehicle may be towed. We are not responsible for towing, or recovery fees.
Please remember to dress comfortably, but appropriately. We do not allow any clothing/apparel that is sexually offensive, or offensive to any person’s religion/race.
We will have seating arranged; you can locate your Workbench by finding your Name Tag and Certificate.
These are materials that Students MUST provide:
One UNLOADED and CLEAN Direct Impingement AR-15 or AR-15 Parts Kit. Chamber Flag is preferred.
When we say bring a CLEAN AR-15, we mean degrease the gun completely and run a dry patch through the chamber and bore. DON’T clean any carbon and don’t use any solvents in the bore. Just bring a DRY and degreased AR-15. The firearm needs to be clean to be gauged and inspected.
A CASE to bring the AR-15 in and out of the building. Please be sure your AR-15 is cased when bring them from and to your vehicle.
You MUST be sure your completed AR-15 will be legal in Maryland. In Maryland there are Legal Pre-Ban AR-15’s and Legal Post Ban AR-15’s. If you are not sure if your AR-15 is legal contact me ASAP. I have a Maryland Law F.A.Q. listed at the bottom of this document.
We have a Test Firing Trap on site, so you CAN bring Ammunition if you wish to have your AR-15 test fired at the end of Class. A maximum of 20 FACTORY Rounds will be required for live fire testing. If you bring Ammunition, DO NOT bring it into Classroom until we give instructions to do so. ALL Ammunition must stay in our Student’s Vehicles until we instruct them to retrieve it. If you want your AR-15 test fired, you need to bring earplugs or ear protection. Handloads and Steel Core (Armor Piercing) Ammunition is NOT permitted.
AR15 Magazines (minimum of 1, maximum of 12)
Try to get a good night of sleep and have an open mind.
Prescription Glasses (IF REQUIRED).
OPTIONAL:
Legal Notepad or Paper to take notes.
If you have a Lawfully Registered Silencer/Sound Suppressor, please bring it so it can be inspected and gauged. A 5320.20 form is NOT necessary to bring a suppressor to Maryland.
Nonalcoholic Beverages and Snacks
Headlamp
Apron
Seat Cushion
Your own Tools and Gauges
MARYLAND AR15 & FIREARM LAWS AT A GLANCE
You MUST be sure your AR-15 will be Maryland Legal. If you are a FFL/SOT or a Responsible Party on a FFL/SOT, you are exempt from Maryland Law for BUSINESS PURPOSES. You must have a copy of your FFL/SOT in your possession.
In Maryland there are Legal Pre-Bans AR15’s and Legal Post-Ban AR15’s. I have attached a list below to help you better understand Maryland Law. If you are not sure if your AR build will be Maryland Legal, please contact me ASAP for clarification. Don’t let Maryland Law scare you away from taking this course. Rest assured there are MANY ways to comply with MD Law and still build the AR you want. I just want to make sure you DO NOT put an upper receiver on ANY lower receiver that is not legally able to accept it while in Maryland.
https://mdsp.maryland.gov/Organization/Pages/CriminalInvestigationBureau/LicensingDivision/Firearms/FirearmSearch.aspx
Some Students just choose to leave their Buttstocks or Pistol Braces at home. By doing this, the AR-15 can’t be classified as a Banned Rifle or Firearm in Maryland if the proper regulations are followed. When a Student does not bring a Stock or Brace, the Student only installs the Buffer Tube/Receiver Extension in Class, and the Stock/Brace is installed once the Student gets back home.
If you don’t want to travel here and back with parts, or a completed AR-15 I have several options listed below to help ensure a legal and stress free AR-15 Class Experience.
If you are concerned about loss, theft, anti-gun State Laws, or interaction with Law Enforcement, then you have some additional options below: YOU MUST RECEIVE AND SUBMIT A REQUEST BEFORE SENDING ME ANY RECEIVER, SILENCER, OR N.F.A. DEVICE. ALL N.F.A. Devices MUST include a copy of an approved Form 1 or 4.
Option 1 You can advance ship me your ENTIRE AR-15, Magazines, Sound Suppressor, and the Lower Receiver ahead of your Class. If you don’t plan to take your completed AR-15 with you once class is completed, please be sure to include a return shipping label and place it inside the box, otherwise I will have to charge you for to ship your AR-15 back to you once class is complete. Do not ship any Optics/Lights/Lasers/Designators. This must be done 3 weeks prior to the Class. This eliminates the risk of loss or theft during your trip to the class. Some Students are worried about legal issues with Maryland and other State Laws when traveling with an AR-15, so this is one way to relieve any concerns. You will only have to travel with your Optics/Lights/Lasers/Designators. Once your Class is complete, I can ship your AR-15 back to your home to you using a Student Provided prepaid shipping label, so you don’t have to travel with an AR-15 that may not be legal when assembled in a certain configuration. The only thing you will be traveling home with is your Optics/Lights/Lasers/Designators. If you don’t want to do this, I have other options listed below.
Option 2 You can advance ship me just your Upper Receiver Group and Magazines ahead of your Class. If you don’t plan to take your completed AR-15 with you once Class is completed, please be sure to include a return shipping label and place it inside the box, otherwise I will have to charge you for to ship your AR-15 back to you once Class is complete. Do not ship any Lower Receiver, Suppressors, or Optics/Lights/Lasers/Designators if you take this route, just sent the Upper Receiver. This must be done 3 weeks prior to the class. This eliminates the risk of loss or theft during your trip to the class. Some students are worried about legal issues with Maryland and other state laws when traveling with an AR-15, so this is another way to relieve any concerns. You will only have to travel with your AR-15 Lower Receiver, Suppressor, and Optics/Lights/Lasers/Designators. Once your Class is complete, I can ship your AR-15 back to your home to you using a Student Provided prepaid shipping label, so you don’t have to travel with an AR-15 that may not be legal when assembled in a certain configuration. The only thing you will be traveling home with is an assembled AR Lower (Which is NOT Banned in Maryland), Suppressor (Which is NOT banned in Maryland), and any Optics/Lights/Lasers/Designators.
NOTE: DO NOT SHIP US ANY AMMUNITION
MD Laws and AR15’s:
What IS NOT Prohibited in Maryland?
If you are a Federal Firearms Licensee/Manufacturer you can travel with AR’s in a Banned configuration.
AR10/SR25/LR308/Large Frame AR’s are NOT Prohibited in Maryland as long as the O.A.L. is 29.00" or more and do not have more than one “Evil Feature”.
NOTE 1: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
NOTE 2: Evil Features Include:
1) Folding Stock (COLLAPSIBLE STOCK DOES NOT APPLY)
2) Flash Hider (Sound Suppressor/Silencers COUNT as a Flash Hider)
3) Grenade Launcher
Rimfire AR Rifle, Carbine, and Pistols are NOT Prohibited in Maryland.
Pistol Caliber AR Rifles, Carbines, and Pistols are NOT Prohibited in Maryland as long as the O.A.L. is 29.00" or more and do not have more than one “Evil Feature”.
NOTE 1: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
NOTE 2: Evil Features Include:
1) Folding Stock (COLLAPSIBLE STOCK DOES NOT APPLY)
2) Flash Hider (Sound Suppressor/Silencers COUNT as a Flash Hider)
3) Grenade Launcher
AR15 Rifles/Carbines in calibers OTHER than .223/5.56 are NOT prohibited in Maryland as long as the O.A.L. is 29.00" or more and do not have more than one “Evil Feature”.
NOTE 1: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
NOTE 2: Evil Features Include:
1) Folding Stock (COLLAPSIBLE STOCK DOES NOT APPLY)
2) Flash Hider (Sound Suppressor/Silencers COUNT as a Flash Hider)
3) Grenade Launcher
Heavy Barrel/HBAR Centerfire AR15 Rifles and Carbines are NOT prohibited in Maryland as long as the O.A.L. is 29.00" or more and do not have more than one “Evil Feature”.
NOTE 1: To be considered Heavy Barrel/HBAR, the Maryland State Police has determined the Barrel or Lower Receiver must be Marked/Stamped Heavy Barrel/HBAR, OR the Barrel/Receiver must be ADVERTISED by the Manufacturer as a Heavy Barrel/HBAR.
NOTE 2: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
NOTE 3: Evil Features Include:
1) Folding Stock (COLLAPSIBLE STOCK DOES NOT APPLY)
2) Flash Hider (Sound Suppressor/Silencers COUNT as a Flash Hider)
3) Grenade Launcher
NON Heavy Barrel/NON HBAR Centerfire AR15’s that were OWNED by YOU before 10/1/2013.
NOTE: There is no "Evil Feature Limit" or 29” + O.A.L. on "MD 10/2013 Pre-Ban AR15's"
AR15 Lower Receivers that YOU PHYSICALLY OWNED prior to 10/1/2013 can be assembled into a 10/2013 Pre-Ban configuration.
NOTE: There is no "Evil Feature Limit" or 29” + O.A.L. on Maryland 10/2013 Pre-Ban AR15's.
AR15 STRIPPED or ASSEMBLED Lower Receivers are NOT prohibited in Maryland. The type of Upper Receiver Assembly, Stock/Brace that is ATTACHED to the Lower Receiver determines it legality.
AR15 Pistols are NOT Prohibited in Maryland.
NOTE 1: Maryland Law defines a Pistol as having a barrel shorter than 16.00”.
NOTE 2: Barrel can be any profile.
Registered Short Barreled Rifle AR15’s with an Overall Length of 29.00" or MORE and an Approved 5320.20 Form.
NOTE 1: Barrel can be any Barrel profile.
NOTE 2: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
Registered Machinegun AR15's/M16's and Approved 5320.20 Form.
NOTE 1: Barrel can be ANY length or profile, and there is no overall length requirement.
NOTE 2: AR15's /M16's with a Registered Auto Sear or Registered Lightning Link count as a Registered Machinegun.
NOTE 3: If you are in Maryland more than 24 Hours with a Registered Machinegun you may be required to REGISTER it with the Maryland State Police.
Sound Suppressors/Silencers are NOT Prohibited in Maryland if you have a Tax Stamp for the Device.
Possession of High Capacity Magazines are NOT Prohibited in Maryland.
What IS Prohibited in Maryland?
As of 10/1/2018 Bumpstocks, Crank Fire Devices, and Binary Triggers are ILLEGAL in MD.
Short Barreled Rifles less than 29.00” Overall Length are ILLEGAL in Maryland. BATFE will NOT approve a 5320.20 to bring them into Maryland.
It is ILLEGAL to Buy, Sell, or Receive Magazines that hold more than 10 rounds while in the State of Maryland.
Handguns in Maryland can ONLY be transported unloaded and cased, and only to a gunsmith, range, exhibition, or between residences.
NOTE 1: DO NOT drive around with a handgun in Maryland. This also applies to N.F.A. Devices with barrels shorter than 16”.
NOTE 2: This does not apply if you have a Maryland Handgun Permit, or is a Law Enforcement Officer carrying under H.R. 218 Credentials.
ANY AR15 Rifle or Carbine that was OWNED on or after 10/1/2013 that has an O.A.L. less than 29.00".
NOTE: Overall Length (O.A.L.) is determined by extending/opening the Butt Stock and measuring from the rear of the Butt Stock to the tip of the Muzzle. If the Muzzle Device is not PERMANENTLY ATTACHED, it does not count towards O.A.L.
Registered A.O.W. based AR15's.
NON Heavy Barrel/HBAR AR15's in .223/5.56 that was OWNED on or after 10/1/2013.
NOTE: A Pistol or S.B.R. AR15 is NOT a Rifle or Carbine under Maryland Law.
AR15 with a FIXED Magazine that holds more than 10 Rounds.
ANY AR15 Rifle or Carbine that was OWNED on/after 10/1/2013 that has 2 or MORE Features. These features are referred to as “Copy Cat Features”:
NOTE: Evil Features Include:
1) Folding Stock (COLLAPSIBLE STOCK DOES NOT APPLY)
2) Flash Hider (Sound Suppressor/Silencers COUNT as a Flash Hider)
3) Grenade Launcher
There is a list of BANNED Rifles in Maryland on the MSP website. The only AR15 that is banned by name is a Bushmaster. Bushmaster AR’s are banned by name unless you OWNED it or before 10/1/2013.
Here are some things I would like you to do before you attend Class:
Inspect your barrel for problems. Take a FACTORY round and manually insert it into the barrel. Push the round into the chamber as far as your finger will allow. If the chamber is cut properly, you should be able to tap the barrel extension on a soft object and dislodge the round. If it does not pass please email or call me.
Check the barrel extension, chamber, and bore for corrosion and pitting. If issues are found contact the barrel manufacturer for replacement.
Perform this test to ensure there is not a problem with your muzzle device or barrel threads. Lubricate the threads on the barrel and install the muzzle device with your hands. Don’t use any tools. This test is to ensure you have compatible barrel and muzzle device threads and to ensure the threads mate together properly. If it does not pass please email or call me.
Ensure your barrel and gas block/front sight base are compatible. Clean the outside of the barrel with a cloth and clean the larger bore in the gas block/front sight base. Lightly lubricate the parts with oil. Without forcing anything, try to see if the gas block/front sight base will slide on to the barrel and over the gas port. We’re not trying to do anything permanent, we are just mocking up the parts. If you experience any resistance, do not force anything. Some barrels have a slightly oversized gas block journal and some gas blocks/front sight bases have an undersized bore. If it does not pass please email or call me.
Another test you can do at home is to install the barrel into the upper receiver and hand tighten the barrel nut. Install the charging handle into the upper receiver, and insert the assembled bolt carrier group into the upper receiver. Make sure the B.C.G. can move freely in the upper receiver. Check to see if the bolt can find its way into the barrel extension. This test is checking for an undersized upper receiver bore, and to ensure the barrel extension is clocked properly. If the barrel extension is not clocked properly, the lugs on the bolt will bind on the barrel extension or will completely prevent the bolt from entering the barrel extension. Don’t use a wrench to tighten anything and don’t force anything. If it does not pass please email or call me.
Take a few magazines and try them in each of the lower receivers you plan to bring. Make sure the magazines fit into the magazine well. Some lower receivers have magazine wells that are so out of spec, and they won’t accept a magazine. Don’t force anything. If issues are found contact the lower receiver manufacturer.
Test to make sure the receiver extension/buffer tube fits into the lower receiver. Make sure the castle nut threads on to the receiver extension/buffer tube. Don’t use a wrench to tighten anything and don’t force anything. If it does not pass please email or call me.
Make sure your stock/brace fits on to your buffer tube/receiver extension. If it does not pass please email or call me.
Test to make sure the upper receiver fits on the lower receiver and then test fit the pivot and takedown pins. Again, you don’t have to install detents or springs. We’re just making sure parts work together. If it does not pass please email or call me.
If you plan to bring a Colt AR lower receiver check to see what pin size it uses. Make sure the upper, lower, and fire control group you have are cross compatible. Some Colt AR lowers and uppers are Milspec size, but SOME Colt uppers and lowers have larger than Milspec pivot pins, hammer pins, and trigger pins.
NOTE: Milspec uppers and lowers have a .247-.250 pivot pin. Large pin Colt uppers and lowers have a pivot pin that is approximately .315. Milspec lowers have hammer and trigger bores that are approximately 154-.155. Large pin Colt lowers have hammer and trigger pins that are approximately .169-.170.
If you read this document in full then you found a way to contact us.
Chad Albrecht
[email protected]
(443) 371-3057 (We only accept calls Monday - Thursday 1 P.M. to 5 P.M.)