Just took my 18.5'' upper out to the range, put in a rainier arms BCG and its on a CMMG lower from another AR that shoots great. Here's the good and the really bad .. The fit and finish is great , and was 100% reliable for the 120 rounds i fired , used M855 , AE55gr and UMC 55gr . My barrel is not fluted like the poster above ?
And the really bad is accuracy , so bad it really cant be zeroed or grouped past 25 yards , at 100 yards best it would do was a 15 inch group !! Pretty much just peppered my target like birdshot , something is wrong with the barrel ! the bullets were not keyholing though, the crown seems fine , the rifling looks normal , same with ejected brass looks fine? Nothing seems to be contacting the barrel inside the handgaurd, no bullet strikes on the FH , barrel must be defective ? I was running a nice German scope and ADM mount all tight and came right off a very good shooting AR? At a loss here , guess i will give the barrel a good cleaning and maybe try again but accuracy this bad i cant see that making a difference . Im sure SFRC will make it right .