My Chiappa M4-22 upper experience (awesome)

[radgokart]

I decided to build myself a trainer, so I slapped together a chiappa upper, new frontier complete polymer lower (I changed the hammer to the one they sell/recommend for .22), and a black dog mag with stainless feed lips. I took a box of golden bullets with me and hoped for the best...

Wow, was I surprised. Had a few fail to fires (worked when i tried again, and a fail to feed, but not a single fail to eject in a 120 round session. The bolt doesn't hold open, but I could care less if it means I have something that'll eat gb. IMO, it's gtg.

[Tom-ADC]

My 22 upper will be here tomorrow I also have a NfA poly lower I'm going to use but maybe I should swap out the hammer like you did.

[radgokart]

I didn't even bother trying the original hammer because it seems to be an issue with 22 uppers. I read a good review where Chiappa was having him try all this wonky stuff, and he decided to try filing down the sides of the hammer and it resolved all his problems.

[radgokart]

The mag it comes with is also said to be useless. I ordered my upper from PSA and they wouldn't ship the mag, hence, me having to buy black dogs.

[Tom-ADC]

I've got Black Dogs also we'll see.