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ChaseFan9

polymer ar-15 lowers

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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?

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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 by MikedaddyH

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

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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!

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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 by ChaseFan9

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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

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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. 

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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.

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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.

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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>

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