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GlockBeni
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Posted: 6/10/2011 4:54:37 PM
[Last Edit: 7/18/2011 4:37:56 AM by GlockBeni]
A couple weeks ago I put a post about me cracking the rear take down pin on my Plum Crazy Firearm lower(http://www.ar15.com/forums/topic.html?b=3&f=118&t=538432 other post) WELL. I guess I over looked another problem




Make a long story short. I went out a several weeks ago an started shooting my ar15 I assembled. I noticed every once in a while it wouldn't spit the casing out and it will stove pipe on me. after about the 4Th time it happened I went to take the rifle apart an noticed the rear take down pin was half missing. I had to use my sight tool handle to get inside the hole to push the pin out and it came all the way through. Sent a message to PCF and they said they would send me a new pin just give them a brief description on what happened. Well i went to take some pictures today an that's when I noticed the huge stress looking crack on the rear of the lower.That would explain the ejection problem..lol...atleast one issue is fixed...

Ps. I was doing double tap drills. No extreme or erratic shooting.




UPDATE. PCF sent me a new lower but to be honest. I'm disappointed in the quality the new lower they sent me. Looks like it was rushed. The edges are the serial number aren't smooth and a couple blemishes.It smelt like it was fired so they did test it. all in all its a lower that will be used so it being a little rough doesn't bother me to much but if you worked in an auto body shop would you send out a car out with fish eyes still in the paint? oh well i guess. hopefully PSA can get me there lower soon.


I was planning on doing some shooting tomorrow but I guess Ill have to wait until I talk to PCF on Monday!!!!
http://farm6.static.flickr.com/5319/5818799409_a910e1a2c0.jpg
IMAG0037 by bxcountryboy, on Flickr

http://farm3.static.flickr.com/2627/5818776285_d1ac742071.jpg
IMAG0038 by bxcountryboy, on Flickr
boarklr
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Posted: 6/10/2011 4:58:02 PM
Yep, it's a plastic receiver allright. Sorry about your bad luck, file it under lesson learned.
sinlessorrow
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Posted: 6/10/2011 4:58:49 PM
Wow that sucks

That alone is why i dont like polymer lowers
GlockBeni
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Posted: 6/10/2011 5:03:55 PM
Yeah.... I wanted a light cheap gun to do local rifle shoots sucks to look at boxes of 223 just sitting on my closet an not being able to shoot..lol. I how I just got a friday or monday made lower. and when they replace it (since they have a lifetime warranty) it will be all better.. I hope
durabo
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Posted: 6/10/2011 5:05:36 PM
You should retitle your post in a more informative way. And offer a link to the other thread, and detail the problem a little bit more.

This is a tech forum and this is good reference material, should be better formatted for search purposes.
die-tryin
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Posted: 6/10/2011 5:22:17 PM
[Last Edit: 6/10/2011 5:22:39 PM by die-tryin]
Thats why I dont like Plastic guns.


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Garandboy
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Posted: 6/10/2011 5:30:00 PM
Don't you have another AR to shoot? I could see using one of these as a test or play rifle. But not my only one and just for this reason. I bring spare rifles to the range just in case one goes down I hate to waste the day.
Handy little carbine. The M44 is a combination flash bang grenade, flame thrower, rifle and spear all in one.
GlockBeni
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Posted: 6/10/2011 5:32:20 PM
I dont have another ar. but do have other rifles that will get played with...
die-tryin
"MADCOW"
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Posted: 6/10/2011 5:35:51 PM
You might be able to repair it and use it as a dedicated .22lr AR????
There is no level playing field in life ~ Para069

GlockBeni
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Posted: 6/10/2011 5:41:15 PM
Originally Posted By die-tryin:
You might be able to repair it and use it as a dedicated .22lr AR????


Im not repairing it. Ill let PCF repair it. lol.
subterfugeinc
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Posted: 6/10/2011 5:44:54 PM
Originally Posted By sinlessorrow:
Wow that sucks

That alone is why i dont like polymer lowers


People don't this problem with the old Cav Arms lowers. Polymer can work, just not in a design meant for aluminum.
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Maryland_Shooter
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Posted: 6/10/2011 6:34:52 PM
Very disturbing indeed - please file an AAR - I was thinking of one for a dedicated .22 build . . .
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carothers22
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Posted: 6/10/2011 6:42:32 PM
What do you expect from plastic.
azmp5
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Posted: 6/10/2011 6:54:30 PM
yet HK g36 / g3 plastic lowers dont crack.
Storm_Tracker
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Posted: 6/10/2011 7:02:02 PM
Your plastic lower receiver cracked? That is just "Plum Crazy".. lol
MTNmyMag
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Posted: 6/10/2011 7:05:58 PM
Yes cheap plastic AR lowers, the back often falls off
AKABARON
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Posted: 6/10/2011 7:08:56 PM
Never thought they were a good idea, yes a lot of people buy them and have no problems but........
My luck it would grenade on me, I also dont trust the Carbon 15s Nice and lite just dont trust them
rgerh
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Posted: 6/10/2011 7:32:10 PM
I have been planning on picking up a plum crazy lower for a light weight build I am wanting to do. But your pictures have changed my mind. I will be building a light weight AR but it will be based on an aluminum lower.

thanks for the information and the great pictures nice and clear
afropro
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Posted: 6/10/2011 7:40:18 PM
I was very close to buying a PC lower for my first build but decided against it. I figured I would just build a regular lower for a few dollars more.
durabo
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Posted: 6/10/2011 7:41:56 PM
Originally Posted By azmp5:
yet HK g36 / g3 plastic lowers dont crack.


that is because they are designed from the ground up to be polymer.

AR's were not.

This is a common issue that manufacturers find when they try and shoehorn materials/retrofit assemblies into the AR platform. The only "reliable" polymer lowers are the Cav Arms ones.. because they were specifically designed to overcome these issues.

If you want a polymer rifle, buy one that was designed to be polymer.
Logan09
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Posted: 6/10/2011 7:56:44 PM
Originally Posted By durabo:
Originally Posted By azmp5:
yet HK g36 / g3 plastic lowers dont crack.


that is because they are designed from the ground up to be polymer.

AR's were not.

This is a common issue that manufacturers find when they try and shoehorn materials/retrofit assemblies into the AR platform. The only "reliable" polymer lowers are the Cav Arms ones.. because they were specifically designed to overcome these issues.

If you want a polymer rifle, buy one that was designed to be polymer.


This...I don't know about the G36, but the G3 has metal reinforcements in the rear, and also the front. I believe the cavarms lower also has metal in it?
wendell
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Posted: 6/10/2011 8:08:03 PM
had a sigma once and will never own another plastic gun as a result. you could actually see the frame bulge out on the side as you pulled the trigger. the front of the frame bowed up slightly to the point where it rubbed the slide.
RC51_Texas
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Posted: 6/10/2011 8:57:21 PM
Originally Posted By Storm_Tracker:
Your plastic lower receiver cracked? That is just "Plum Crazy".. lol




Made me laugh!
storminnorman
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Posted: 6/10/2011 9:08:41 PM
I'd tell them to shove it up their ass.
GlockBeni
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Posted: 6/10/2011 11:04:52 PM
I'm not going to bash PCF just yet. I mean SH@T happens. I'm giving them the benefit of the doubt. I'm just hoping that this product was a Friday or Monday made lower. Yes something like this more than likely would of never happened with a aluminium lower but hey if they have the warranty and truly stand by it im not worried "YET"
007Kevin
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Posted: 6/10/2011 11:40:28 PM
Originally Posted By wendell:
had a sigma once and will never own another plastic gun as a result. you could actually see the frame bulge out on the side as you pulled the trigger. the front of the frame bowed up slightly to the point where it rubbed the slide.


You can't compare that with other polymer framed guns. It doesn't even feel like the polymer used in HK, Glock, M&P, Sig Sauer, Walther, etc. That was a cheaply designed firearm and it came out as such. You could find deals at regular big box gun stores for $200 bucks - seriously.


PC doesn't have metal reinforcements in the receiver?
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