Revival of a 2026 thread so not too bad for me.
I have two AR 10s. A 20" DPMS Hunter in 308 that has a few mods. Good, accurate, shooter. .375 inch groups at 100 consistently.
Then, a Ruger SFAR 22" rifle plus 1 6mm Creedmore that doesn't have much SFAR left in it. The latter was not a shining example of Ruger quality. Or maybe it was! Nor was Ruger's service work to get it right. Maybe they started it at 4:30 on Friday afternoon. I don't know. It started life as a 6.5 Creed. The barrel was not throated correctly. If you wanted to eject a round the bullet would jam and separate from the case, dumping powder in the upper and lower. I sent it back with a note and a long talk on the phone as this was not the only issue. The gas block was crooked and the adjustment stuck. And the charging handle would come back and hit you in the lip on the last shot. They sent it back with a 5 shot group. I'm thinking maybe they fixed it. Nope. Evidently they didn't read the entire note or try ejecting a loaded cartridge. Still land marks on the bullet all the way to the brass on loads way below saami OAL with several bullet brands and factory loads. They did straighten the gas block and put a new charging handle on it. I promply removed the gas block when I got it back as the rifle was still not fit for hunting with the throat issue and manual ejection powder dumps plus having to take a dowel and get the stuck bullet out. I said the heck with Ruger. I build AR15s regularly. I'll do it myself. I've never really been wowed by the 6.5 Creed, so I ordered a custom 22" 6mm Creed and new barrel extension. That plus a new adjustable gas block, heavier buffer, rifle plus 1 gas system, Geissele National Match 2 stage trigger (always), and things are running the way they should be, its accurate, and it doesn't tear brass up.. I may try a rifle length buffer tube, buffer and spring to smooth the recoil pulse a little. Next time instead of the small frame version I'll just build my own standard sized 10 from scratch.