Started life as a DPMS LR 260 now supports a 22" Bartlein barrel 8.5 twist, JP Extended handguard, PRI adjustable brake, Custom brake, Jp Trigger, UBR Stock and carbine buffer. Soon will support a Bushnell HDMR G2 with ADM mount im sure. Will run Amax 123's thru it. I was going to run 6.5 but really didnt want to be stuck to one manufacture of brass and there are so many other comps. that make 260 brass and I can use lots of other brass out there. Let me know what u think or ideas that my help with the build. Also thinking about a rattle can job :/