We use this .080 String Trimmer Line (14″ Length) as a Gauge. Its the perfect diameter to check your Gas Tube and Carrier Key for obstructions.
If you buy your own from the store, be sure you purchase ROUND String Trimmer Line, not the Twisted/Splined. The Twisted/Splined Trimmer Line is not suitable for gauging.
U.S. SALES ONLY!
This product is shipped directly from the School of the American Rifle Shop.