The Black Rifle Arms C.A.P.S. Upper Receiver
This review of the Black Rifle Arms C.A.P.S. upper receiver highlights its innovative Captive Adaptive Piston System, designed to mitigate carrier tilt with a polymer buffer. The adjustable gas block offers four settings for various ammunition types and conditions, and the system can be adjusted without tools. The reviewer notes its reliability and ease of use, though suggests improvements like drilling and pinning the gas block for enhanced security.











