polymer ar-15 lowers

[ChaseFan9]

The polymer lower has been out for a while now, and it's come a long way since. I wanted to get an 80% just to practice up before I go to an aluminum one, but it'll still see a good bit of use. I was wondering, can anyone speak on the strength and endurance of polymer lowers? I'm sticking with 5.56 or smaller, about how many rounda can I expect to run before I've got a broken piece of plastic?

[ChaseFan9]

Really, any experience with polymer lowers, 80% or otherwise, will work :)

[MikedaddyH]

They work JUST fine ! I have them on .223rem , 6.8spc , .22lr and a current .40s&w ar built.

Shot hundreds of 6.8 rounds (600 -700). 223 pistol (400- 600)rounds.

Ar15 in 223/556 (500+)rounds. Ar in 22lr over 1500+ rounds.

Plumb Crazy brand has showed no problems or wear.

Edited May 18, 2015 by MikedaddyH

[EasyEJL]

If you're going to build an A2 style, rainier has these on sale, and these avoid the buffer tower issues that sometimes do happen with polymers. but they aren't 80%ers

http://www.rainierarms.com/gwacs-armory-cav15-mkii-lower-receiver

[blue109]

I think sort of defeats the purpose of an 80%

[AngelDeVille]

What IS the purpose of 80% lowers anyway?

I can spend more, AND make the dam thing myself!

Sign me the fuk up!

[blue109]

Some poor folks have to register lowers with big brother. Finishing an unserialized 80% lower is a way to avoid the paper trail.

[slugger43]

Best reason to do an 80% - in any caliber - is....because you can!  The polymer ones are often cheaper.  Hey, if you foook it up, go get another one and do it again!

 

Hey, this stuff is supposed to be fun!  Enjoy!

[ChaseFan9]

Best reason to do an 80% - in any caliber - is....because you can! The polymer ones are often cheaper. Hey, if you foook it up, go get another one and do it again!

Hey, this stuff is supposed to be fun! Enjoy!

This guy's got it! Do it, cuz 'Murrica <lmao>

So the polymer pistol lowers hold up well?

Edit: 80% lowers are good because, believe it or not, most of us don't have access to CADD or CNC

Edited May 19, 2015 by ChaseFan9

[Toolndie7]

This guy's got it! Do it, cuz 'Murrica <lmao>

So the polymer pistol lowers hold up well?

Edit: 80% lowers are good because, believe it or not, most of us don't have access to CADD or CNC

 

80% are good BECAUSE I have access to that. No jigs or drill press needed here. lol

[ChaseFan9]

Yeah, but you don't even need an 80%, Tool :P

[snicl1]

my plumb crazy lower is still running after about 600 rounds but the polymer FCG may have to be replaced soon.  it works, but hammer (plastic) is showing signs of use.  I'll replace it w/a mil spec unit when the time comes. 

[mrmackc]

Is that a Mattel or Hasbro Lower?

[MikedaddyH]

What .... Where you expecting Body by Fisher !. LOL

[D.R.D.]

I run a New Frontier LW-15 polymer lower. Runs like a top, no hiccups. Look into Robar`s PolymAR-15 or Tegra Arms composite lowers too.

[mrmackc]

I think new technologies are great, Polymers, carbon composite,  computer generated 3D printing and  imaging and the  laser target acquisition  are just a few.

 

Us old codgers appreciate the great work of folks like Jacob and Samuel Hawken , Christian Sharps, John  Browning, Sam Colt, S&W,  Winchester, David Marshall 'Marsh' Williams, Bill Ruger and Garand should be preserved.

[unforgiven]

Got "The M1 Garand: owners guide" by Scott A. Duff great read.

Edited May 31, 2015 by unforgiven

[GRA]

I think new technologies are great, Polymers, carbon composite,  computer generated 3D printing and  imaging and the  laser target acquisition  are just a few.

 

Us old codgers appreciate the great work of folks like Jacob and Samuel Hawken , Christian Sharps, John  Browning, Sam Colt, S&W,  Winchester, David Marshall 'Marsh' Williams, Bill Ruger and Garand should be preserved.

 

And the late Mr. John Armstrong formerly out of Emmitsburg, MD ...  <thumbsup>