Polymer lowers

rugerdawg · November 5, 2012, 11:47 AM

A question for those of you who have tried out either the "plumcrazy" or "new frontier" lowers. Do they use a mil-spec or a commercial buffer tube and can they be changed out to an aluminum one?

zukiphile · November 5, 2012, 12:21 PM

I have a couple of NFs, but not with their Receiver Extension. I am given to understand that their carbine stocks are a commercial tube and normal stock.

I've put together a stripped NF with a delton LPK. One problem: the NF is very tight and my magazine catch was very sticky before some time with a dremel.

darestie · November 5, 2012, 01:45 PM

I'm 100% positive that my New Frontier LW-15 takes commercial diameter stocks, not mil-spec. It's a pretty good lower.

Fishbed77 · November 5, 2012, 03:36 PM

Does anyone have any experience with the ATI Onmi polymer receivers (that supposedly take standard AR lower parts). I'm thinking one might be nice for a lightweight hunting AR.

wnycollector · November 5, 2012, 04:59 PM

Another polymer lower option is the Cav Arms MKII. I own three and they show zero wear after several years of use and thousands of rounds. Here is a link to the new maker of the Cav lowers.

ronl · November 7, 2012, 11:24 PM

I've been very pleased with my New Frontier lower. The trigger was surprisingly good.

The Long Shot · November 7, 2012, 11:59 PM

Quote:

A question for those of you who have tried out either the "plumcrazy" or "new frontier" lowers. Do they use a mil-spec or a commercial buffer tube and can they be changed out to an aluminum one?

They've been fine for what I've used them for. I wouldn't trust one with my life just because they haven't been proven like the aluminum ones have. They should accept any aftermarket buffer tube. If you are replacing the buffer tube it doesn't matter if it's a commercial or mil-spec buffer tube. It only matters when choosing a stock.

Justice06RR · November 8, 2012, 02:16 AM

Quote:

Does anyone have any experience with the ATI Onmi polymer receivers (that supposedly take standard AR lower parts). I'm thinking one might be nice for a lightweight hunting AR.

I have one of the ATI polymer complete lowers. It uses a commercial tube and stock.

It is actually decent quality as long as you don't make this your HD/SD rifle. mine is going to be built as a lightweight AR pistol so a polymer lower is perfect for this purpose.

A couple of things to note, magazines don't fall freely with the ATI lower. Not a problem for me as long as you know this ahead of time. The fitment with an upper is very tight, which is actually a good thing. No slop or play at all when attached to one of my complete uppers.

viciouskitty · November 9, 2012, 03:15 PM

Whew justice your making me feel better, just ordered me an ATI complete lower a few days ago and I have been worried about reports of poor quality. A quick question if the lpk actually a standard GI type? or proprietary?

November 5, 2012, 11:47 AM	#1
rugerdawg Member Join Date: February 18, 2009 Posts: 68	Polymer lowers A question for those of you who have tried out either the "plumcrazy" or "new frontier" lowers. Do they use a mil-spec or a commercial buffer tube and can they be changed out to an aluminum one?

November 5, 2012, 12:21 PM	#2
zukiphile Senior Member Join Date: December 13, 2005 Posts: 4,451	I have a couple of NFs, but not with their Receiver Extension. I am given to understand that their carbine stocks are a commercial tube and normal stock. I've put together a stripped NF with a delton LPK. One problem: the NF is very tight and my magazine catch was very sticky before some time with a dremel. __________________ http://www.npboards.com/index.php

November 5, 2012, 01:45 PM	#3
darestie Member Join Date: December 2, 2007 Location: Sugar Land, Texas Posts: 57	I'm 100% positive that my New Frontier LW-15 takes commercial diameter stocks, not mil-spec. It's a pretty good lower.

November 5, 2012, 03:36 PM	#4
Fishbed77 Senior Member Join Date: November 23, 2010 Posts: 4,862	Does anyone have any experience with the ATI Onmi polymer receivers (that supposedly take standard AR lower parts). I'm thinking one might be nice for a lightweight hunting AR.

November 5, 2012, 04:59 PM	#5
wnycollector Senior Member Join Date: April 22, 2007 Posts: 1,996	Another polymer lower option is the Cav Arms MKII. I own three and they show zero wear after several years of use and thousands of rounds. Here is a link to the new maker of the Cav lowers.

November 7, 2012, 11:24 PM	#6
ronl Senior Member Join Date: December 2, 2007 Posts: 1,100	I've been very pleased with my New Frontier lower. The trigger was surprisingly good.

November 9, 2012, 03:15 PM	#9
viciouskitty Senior Member Join Date: August 6, 2010 Location: South Texas Posts: 316	Whew justice your making me feel better, just ordered me an ATI complete lower a few days ago and I have been worried about reports of poor quality. A quick question if the lpk actually a standard GI type? or proprietary?