Black Rifle Arms C.A.P.S. Piston Conversion in 6.8 SPCII
Posted: 29 Aug 2016, 17:24
Here's my new Black Rifle Arms upper using their C.A.P.S. piston system. I had this one build in 6.8 SPC. BRA uses a short stroke piston system with an adjustable gas block that has 4 settings: normal, suppressed, adverse, and over-gassed.