Polymer AR15 lowers

A couple of threads got nuked about people buying them specifically so they had an unregistered ar. I think that pretty much sums up the sole reason to buy one. There is so little to be done on them it's not like you are doing them for the sense of accomplishment
 
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There is a generic FRT number for homemade ARs. Perhaps a polymer lower would result in a -X leaf entry. 12345-X
Members have reported that registering one is no problem. Submit photos showing that the firing mechanism pocket will not accept a M-16 auto sear.
Advice from the RCMP is to register early rather than late.
 
My entire first post wasn't 100% specifically referring to our new Canadian start up even though I did mention them as a example. I can see how I worded the post wrong. I'm curious know about polymer lowers for AR15's in general. I know there are a few manufactures making them down south. I'm curious to know if any floated up this way and what people thought of them.
 
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I use one with a dedicated .22 upper. It works perfectly.

There is no reason they won't work fine for any standard AR build. I don't think I'd use one for a big bore build though. They're likely still strong enough, but I'd prefer the peace of mind, haha.
 
Problem with the polymer lower is the buffer tube extension threads are very fine couple with the fact the buffer tube are aluminum, so if you are not careful they are easily cross threaded and in time the constant pounding from the recoil buffer will eventually file off the treads on the polymer lower, some kind of metal thread insert would be a possible solution.
 
cold day.. drop your rifle butt down on something hard.... crack! Not for me thanks.. maybe once perfected. But with alloy available for $69 (at least when I bought my Anderson Lower) WTH would you want plastic??

just my 2 cents
 
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