[ARCHIVED THREAD] - Thoughts on Polymer Lower for AR-57

Posted: 10/12/2012 4:58:19 AM EDT

So i'm thinking of building an AR-57. But I was wondering if the ATI Omni Lower (Polymer) would be a good choice for the 5.7x28 round.

Has anyone had any experience with the polymer lowers?

Posted: 10/12/2012 5:12:45 AM EDT

[#1]

My first thought/concern would be the potential for damage to the polymer magwell and surrounding areas due to the way the AR57 uppers eject.

Just a thought.

Posted: 10/12/2012 5:24:05 AM EDT

[#2]

Quoted:
My first thought/concern would be the potential for damage to the polymer magwell and surrounding areas due to the way the AR57 uppers eject.

Just a thought.

that's what i was thinking as well. hot brass going against the polymer magwell. but i've also seen that people will take a regular mag and "trim" it to catch the brass. and if that's the case, i would guess that the "gi-mag" would take care of the heat/edges from spent brass.

but recoil on the buffer threading? i don't think that would be an issue.

Thanks

Posted: 10/12/2012 11:10:06 AM EDT

[#3]

I'd use a 10-round GI mag with the floor plate removed as a "liner" for the mag well if I were going to attempt this with a poly lower. I don't see recoil as an issue.

[ARCHIVED THREAD] - Thoughts on Polymer Lower for AR-57

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[ARCHIVED THREAD] - Thoughts on Polymer Lower for AR-57

[ARCHIVED THREAD] - Thoughts on Polymer Lower for AR-57