Precision/precision tests of the barrel was executed following a two hundred round break-in period. All taking pictures was performed from my bench-relaxation set-up following my usual protocol. only one knowledge stage, I picked up several salty applied P&S M4 RAS's from Thoroughbred for $150 ea. yeah, not KAC, but adequate https://m4-ras-rail41740.thenerdsblog.com/35117679/a-secret-weapon-for-m4-ras