Well, I'm new here, but I'll give you my impressions.
I bought a Chiappa and a Plum crazy lower, thinking I'd get into a .22 AR for plinking, and because, frankly, I'm a pretty poor person, so I don't have big money to buy expensive guns. I figured I'd update it as I went along. I had to shave the plum crazy firing pin (too poor to buy the blowback hammer.
I had horrible fail to feeds, and failure to ejects, BUT...
I grabbed a barrel cleaning brush for an Ar15, stuck it in a drill, and just "polished" the feed ramp, and throat and chamber. Just polished the crap outta it.
it now shoots completely flawlessly, and I just love it.
Jeff
That's the reason I'm here (that rifle).