I think 1911 Academy specializes in pistols. I don't think they work on rifles. Correct me if I am wrong.
Although my buddy swears by them. Had a surplus Zastava M88 that was a jam-o-matic and the sights were way off.
Took it in for them to look at it and the smith took it back and came back in 15 minutes and handed it back to him. Polished the feed ramp
and adjusted the sights. He said it shoots dead on and will handle every type of bullet he has run through it now without failure. He was very happy with the cost too.