Anyone built one off of one of these. I'm skeptical about polymer in a full caliber rifle but I think they would hold up well with a dedicated .22lr upper.

Friend built a PC with a Chiappa, runs great.

The Plum crazy lowers use a different hammer with 22 rimfire. From what I read you need to get rimfire hammer from P/C as center fire hammer is to wide to work with CMMG bolt.

A PC lower is perfectly adequate for this particular application and, since you get a completely assembled lower, it represents a significant cost savings over a $90 Aero Precision receiver, $70 LPK, and $40 stock kit. This is the route I took for my light weight .22LR build, and I'm very satisfied with it. If you're thinking of using the receiver for a centerfire upper, I'd be skeptical as well, until a sufficient body of evidence can show the value of a plastic lower in such a role.

Also, someone suggested that the PC lower is "plastic foreign crap." That's just stupid. They're made in Arizona; and, for a dedicated rimfire plinker, they're perfect.

No.

For about the same amount of money you can get a forger lower from PSA.

They have sales all the time––$50 lowers. You can get complete LPKs with buffer and stock assemblys for $100Link . So, $150 gets you a complete forged lower. IF you dont want to wait for a sale, AIM surplus has SAA forged lowers starting at $60. Link

So yeah, like I said, for $20 to $30 more you can get a forged lower with a steel (not plastic) LPK.

Also, pistol caliber ARs are EXTREMELY tough on lowers. I would put a PC lower on a .223 long before I would ever put one on a 9, 40, or 45. YMMV.

My advice is not just here-say. I have seen in person a PC lower break. They are plastic trash, and have no place in the AR world. If they could make them like HK does their pistols (metal with infused polymer over-mold) then I might actually give them a try.

Obviously you guys aren't getting the point. I can get an entirely assembled lower for $100 and a .22 upper for 300 hmm 400 for a .22lr isn't bad to me. If I have to swap the FCG thats gonna set me back what 35 smackers. I could careless what everyone's opionion is on the plastic gun mantra I killed that in the original post. I just wanted to know if it ran fine or not. One person gave me a good thing to look at a new trigger and hammer. The pins and springs are all metal in the thing the only thing different is the trigger and the lower itself is a high tolerance polymer. If it shoots .22lr all day I don't really care if its metal or plastic. Heck look at all the plastic handguns everyone loves now.

For a full on AR I wouldn't use this has I think it would breakdown over time a lot quicker but. Why would I spend 90 for a lower 70 for a lower partts kit, another 35 for a buffer tube and 50+ for a stock when I can get it all for $100??? Basic economics come into play there its going to be a .22lr gun for life...

The Plum Crazy is a great lower to build a 22rf up on. These guys that say that the plastic internals are crap.....don't realize that an FNH PS 90 has a plastic hammer and trigger, and they work great.

If you can get the whole thing for a 100 bucks....buy it and don't look back. I bought one for a lite weight 22RF build....it had the wider hammer, which I just ground down the sides so it would clear and have been running it ever since. I actually put a JP red hammer spring in and it still is a very reliable firearm. I also swapped out the butt with a Magpul CTR, took out the the buffer (no need for a buffer on a Nordic 22rf upper) and I have a sub 5 pound rifle.

Tim

PS...before you swap out the hammer and trigger....try it, you'll note that it has a very smooth trigger out of the box.....and they will last....no problem.

Thats unfortunate that you've found that.....I've found the opposite to be true. The plastic hammer worked just fine.....once I've narrowed it up to clear the bolt.

LOL. Too funny. Don't buy them, more for me. Lifetime warranty, many satisfied users. To each their own. I have dozens of lower. I like variety, I like new advances. If it breaks, big deal. They will replace it or return my money. I bought two for $258 TMD, so I am not gonna go broke over two lowers.

I wouldn't stake my life on it, but I fail to see the harm in a PC lower for a fun project.

Hearsay . . .

Got a pic of your hammer and spring?

The plastic hammer fits my CMMG and Ciener conversion uppers - just won't allow them to cycle fully, so it's a single shot, with a nice up-in-the-charging-handle jam on every attempted extraction.