jimmyp ,to date all the ammo I've shot thru it has been my 223 handloads using either commercial brass or GI. The barrel says it's a 223 Rem 1/9 twist 22" chrome moly,I did not see any reference in the Remington catalog from 2008 to having a chromed chamber or bore or any mentioning of a nitride job either.Remington had Bushmaster make the guns for them. Remington sure tried to distance the R-15 VTR from being classed as a "black rifle" to me they are all AR platform guns period. Some will disagree but if it has a failing, it is the no provision for a BUIS frt sight.When I got it I thought this would take care of my AR needs but was wrong.I continually find myself handling the the shorter barrelled carbines with a collapseable stock,flattopped, picatinny rail on the gas block for BUIS. Looking for a behind the seat portability in a short pkg.Owning multiple guns seems to be an life long addiction for me. I quit fighting it too. Magnum Man
