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2/14/2014 4:29:56 PM EDT
Hello all, I am new to this forum. I recently bought a Smith & Wesson m&p Sport rifle. I am looking into to modification parts and I can across a polymer lower. I am guessing this is just to make the gun lighter. Would you buy this for anything else? Are there any advantages/drawbacks to this lower?
2/14/2014 4:45:51 PM EDT
[#1]
Depending the lower mfg you may want to run away from the polymer lowers..

google ar-15 polymer lowers and you will see a LOT of pics of busted ones..  typically they break where the stock attaches to the lower


The exception to run in polymer lowers is the GWACS Cavalier Mk II - the stock is built in as part of the lower and I have not heard any saying they broke theirs..

Brian
2/15/2014 9:10:42 AM EDT
[#2]
There are no advantages to a polymer lower.
2/15/2014 9:23:07 AM EDT
[#3]
Quote History
Quoted:
There are no advantages to a polymer lower.
View Quote

2/15/2014 7:57:11 PM EDT
[#4]
ok thank you
2/16/2014 1:42:31 PM EDT
[#5]
Quote History
Quoted:
Depending the lower mfg you may want to run away from the polymer lowers..

google ar-15 polymer lowers and you will see a LOT of pics of busted ones..  typically they break where the stock attaches to the lower


The exception to run in polymer lowers is the GWACS Cavalier Mk II - the stock is built in as part of the lower and I have not heard any saying they broke theirs..

Brian
View Quote


Here's and observation about the Cav15 lower:  since the stock, grip, and buffer tube are integrated, the weight savings is distributed across the entire lower.  This differs from using a standard poly lower, where you still have a big chunk of weight on the back in the form of a standard buffer tube and stock.
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