Polymer AR-15 lower
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polymer ar15 lowers arent the same as polymer pistol frames. there are longer straight lines that lack substantial re-enforcement. wear points are at the receiver extension area where a LOT more force than you think happens, the sear/trigger/hammer pin holes are also areas that wear even in aluminum receivers. when a poly receiver fails its usually at the receiver extension.
if they had some extra strength in those areas they would prolly be worth taking a look. do yourself a favor and skip em till the technique is improved
if they had some extra strength in those areas they would prolly be worth taking a look. do yourself a favor and skip em till the technique is improved
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3,494 Posts
Id buy one, if I didn't already have a couple of strippers just collecting dust atm.
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1,427 Posts
I agree but would still like to see them give more attention to the rear of the receiver. It also looks like they collapsed the stock before throwing it. Alos when they used it as a step they put the weight more toward the front of the receiver. He stepped on the barrel nut. It almost seems like they were protecting the area where the receiver extension attached.
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154 Posts
There is no way Polymer can stand up against 7075T6 or even 6061T6. They are showing that the lower will stand up to normal abuse from what is normal to happen to a rifle in use.
You can fire it 50K times without worry
You can drop it without worry
You can drop it real far without worry
You can subject it to extreme pressure without worry
Can you do all the same things to the extent you can with a metal AR15...No.
You need to decide if you NEED that or will what a polymer lower do is fine for you. The weight savings of a polymer rifle is appealing to many.
You can fire it 50K times without worry
You can drop it without worry
You can drop it real far without worry
You can subject it to extreme pressure without worry
Can you do all the same things to the extent you can with a metal AR15...No.
You need to decide if you NEED that or will what a polymer lower do is fine for you. The weight savings of a polymer rifle is appealing to many.
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1,427 Posts
I'd love to do it. I'm actually thinking of getting one for personal use. However breaking my own stuff isn't high on my list. Someone send me one.
Will the thing stand up to a firm butt stroke? That's normal use for some. Hell some use their extension to do all sorts of thing during normal use. For some people using it as a bat or busting locks is normal. I broke some fairly respectable welds on an AK during what I consider normal use. I have never done anything to any firearm it wasn't designed to do.
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2,174 Posts
The other concern? How much of that weight loss isn't the lower, but the parts in it? If someone is that worried about weight, get rid of some of the bling that they put on the rifle. I'll sacrifice the luxury items that I don't really need before I'll sacrifice a component I consider crucial.Personally I would stick with forged or billet aluminum and to those that obsess about weight ...
a whopping 8oz difference..... do some damned push ups!
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1,427 Posts
I agree but if only it was that easy. A slung weapon will ware you down no matter how strong you are. I've seen dudes w/ huge shoulders *****ing about how "heavy" their weapon was. 8oz is half a pound. Add a couple of those here and there and see how quickly the firearm looses it's maneuverability.dog2000tj said:Personally I would stick with forged or billet aluminum and to those that obsess about weight ...
a whopping 8oz difference
Even the Army makes weight a priority. The just did an overhaul of their 240s in order to lighten them up.
Smarter not Harder.
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7,141 Posts
I have a Plum Crazy polymer lower mated to a PSA upper. I have not had enough rounds down range to tell you how it will hold up over time. But I can tell you the following...
Mag well is no problem. Magazines lock up solid.
There is no slack between the lower and upper. They fit like a glove.
The Plum Crazy trigger leaves a lot to be desired. It's crunchy, but I doubt much worse than any other stock trigger. It will be the first thing replaced.
Safety will eventually be replaced, but it is not a priority.
I would buy it again. I figured that if it didn't work out, I'm not out much.
Mag well is no problem. Magazines lock up solid.
There is no slack between the lower and upper. They fit like a glove.
The Plum Crazy trigger leaves a lot to be desired. It's crunchy, but I doubt much worse than any other stock trigger. It will be the first thing replaced.
Safety will eventually be replaced, but it is not a priority.
I would buy it again. I figured that if it didn't work out, I'm not out much.
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7,545 Posts
Polymer works in the Glock lower, we're still waiting for that kind of reliability/durability in the AR.
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