Why polymer not a replacement for aircraft grade aluminum!

[RobMoore]

I didn't get past the thread title.

"Aircraft grade aluminum"

Almost as useful as saying "milspec".

 

[Nanook]

i doubt you could repair a poly lower, but same question about an inoperable aluminum lower also, what would you do with it??

john

John,
First I'd figure out what the hell I did to screw it up so bad. Then I'd JB-Weld that sucker back together. YMMV. IANA(gunsmith).

 

[the Javid]

I don't know shit about metals, I just have never had a metal lower crack.

 

[deanremix]

It's one of those "hold my beer, im gonna try somethin..." moments. I'd say slap some epoxy on that biatch and let'er eat

 

[the Javid]

I sent it back through my dealer. Luckily I had a spare.

 

[Absolute]

Ouch, that sucks. Noted

 

[Gbh]

I could see that lower sold on Gunbroker as the bre-ban flexible stock model.

 

[yellowsled]

id gorrilla glue that

 

[Markp]

View attachment 75490 after 6 years if abuse I started having failures to feed. Didn't realize why til I got home and tried to clean it.

So... If you're ready to sell it. I'll give you $10 + shipping to my FFL for it!

Better than nothing, right?

 

[the Javid]

I already gave it to my ffl to send back to see if they'll give me a replacement.

 

[HT4]

It's one of those "hold my beer, im gonna try somethin..." moments. I'd say slap some epoxy on that biatch and let'er eat

Seems like a good idea at the time... until your front teeth get knocked out by a BCG.

 

[Hopalong]

That looks to me more like poor design / insufficient reinforcement than a testament to the (un)suitability of polymer for lowers. Even polymer frames on handguns have a good bit of steel in there.

I would say that having a lower made entirely out of polymer would be a very bad idea.

 

[smores]

That looks to me more like poor design / insufficient reinforcement than a testament to the (un)suitability of polymer for lowers. Even polymer frames on handguns have a good bit of steel in there.

I would say that having a lower made entirely out of polymer would be a very bad idea.

You have obviously not seen a Plum Crazy lower... you can flex and twist the receiver by hand. If there is steel reinforcement, its minimal. Ive seen several pictures like the one above where it's cracked partially or entirely through that portion of the receiver. I'm in the 7075 aluminum camp. Or better yet the new Turnbull color-cased steel TAR-10s! :thumbsup

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[Kman]

id gorrilla glue that

slacker. That calls for JB Weld...and plenty of it.

 

[Jester1341]

Am I the only one that read the part that said 'after six years of abuse'

Even if it was normal use not 'abuse' SIX years!? That's like ten bucks a years.

John

 

[smores]

Am I the only one that read the part that said 'after six years of abuse'

Even if it was normal use not 'abuse' SIX years!? That's like ten bucks a years.

John

Still a broken lower. In basic training at Ft. Knox I saw some probably 30+ year old Colt M16A1s that had been converted to A2s. I guarantee they saw 100x more abuse, and had not fallen apart. That's what matters.

I will never understand the lengths people will go to in order to justify being cheap in this industry.

If you want a polymer lower, fine. Just be ready for people to give you crap about it... lol

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[the Javid]

I bought it thinking it would be just as strong without having to worry about it corroding. I wasn't trying to go cheap.

 

[Blaster229]

cauterize it with a wood burning tool.

Sent from somewhere in the world.

 

[armed ferret]

polymer lowers are useful for an inexpensive way to build a really lightweight .22LR gun that, in a pinch, could be used as a full-blown 5.56 receiver.

but that's really about the wisest use for 'em....22's.