CMMG 60D100C Barrel Sub-Assembly 6mm ARC 16.10" Black Nitride Finish 416R Stainless Steel Material Rifle Length with Medium Taper Profile for AR-15 $168.50
Ballistic Advantage BABL6MM001PQ Premium Series 6mm ARC 16" Threaded SPR Profile, Midlength with Low Pro Gas Block, Black QPQ 4150 Chrome Moly Vanadium Steel, Fits AR-15 $232.75