Originally Posted by DrewNJNC
Great points guys, really appreciate it. The torture test they have online where they're applying force to the mag wells and the aluminum cracked and couldn't drop the mag to where the polymer went right back to normal, was intriguing. Think of handguns. I've shot thousands of rounds through my Glock and other polymer pistols and they're perfect. If they can make a Boeing Dreamliner out of carbon composite they can make a quality AR out of polymer.
Remember the Glock was engineered for a polymer frame and today it's a proven design. The AR was engineered for aluminum receivers and also has stood the test of time.
No doubt in time a reliable poly lower will come along but for now I'm in no rush to be the one to test the latest one coming down the block.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek