Plumcrazy lower and Chiappa .22lr upper not firing HELP!!!

[Warguy]

Hey guys well i just got my lower out of jail today and i put everything together and took it out and it wont fire a single shot!! Any advice on where to begin looking would be great, i dont know if its the upper or lower. I have the Plumcrazy lower and Chiappa m4-22 upper. Please help, my trigger finger is burning with desire!!!!!

[Warguy]

well i figured out the prob. The hammer is not contacting the firing pin. The hammer wont fit into the slotted area where the firing pin is, i dont know if the hammer is to fat or the bolt carrier is too narrow, is there any way to tell which piece is the one that wrong? Thanks

[uxo2]

You need a blow back hammer that Plum Crazy sells for .22lr uppers...about 10 bucks.

The hammer is narrower.

[Merc1138]

Get an actual AR hammer and compare it to the width of the plumcrazy plastic hammer.

(It's probably the cheap plastic components that are out of spec. Not a guarantee, but that's the first thing I'd swap out)

[bjl333]

Get an actual AR hammer and compare it to the width of the plumcrazy plastic hammer.

(It's probably the cheap plastic components that are out of spec. Not a guarantee, but that's the first thing I'd swap out)

The hammer isn't out of spec.

You'll need a 22 hammer from PC.

[uxo2]

BTW...
I have the same set up......
Runs great after I installed a Yellow spring on the hammer....

If you cant wait....you can file down the side of the hammer.

Or drop in a replacement trigger pack.

I waited and just bought a Blowback hammer from PCF

[Merc1138]

The hammer isn't out of spec.

You'll need a 22 hammer from PC.

Yet I've seen plenty of reports of people using the Chiappa upper on a normal lower with a standard parts kit. Sounds like the PCF hammer is out of spec to me.

[bjl333]

The PC hammers are designed wider. That is why they sell a 22lr hammer that is narrower!

[Merc1138]

The PC hammers are designed wider. That is why they sell a 22lr hammer that is narrower!

So then it IS out of spec, or at least not matching the same standard as most other companies.

[Warguy]

well after a little research i did find that to be true that the hammer is way to wide, i did not know however that they sell a specific .22lr hammer for it but i just took the sides of the hammer to the grinding wheel. I was able to take it to the back woods and test fire it and it worked perfect. So do you guys think that since i filed it down, if i swap out the upper to a .223 will it still be ok or do you think ill need another hammer?

[stitchnicklas]

should be fine,if it breaks just change the hammer for a standard dpms one.

i have a chiappa upper on a delton lower,800 rds...zero issues

[bjl333]

So then it IS out of spec, or at least not matching the same standard as most other companies.

I see what you're saying. Yes its not milspec.

[JMacRevo]

I was able to take it to the back woods and test fire it and it worked perfect.

I hope these were not "back woods" anywhere in the Moreno Valley area

[Warguy]

I hope these were not "back woods" anywhere in the Moreno Valley area

not really, like on the edge towards san bernardino...

[Warguy]

I hope these were not "back woods" anywhere in the Moreno Valley area

by the way long time no talk, hope everything is going good for ya. Didnt even know u were on these forums.