It's been proven that polymers can withstand heat and impact to make reliable weapons like Glock and others... Now I have been thinking about something recently that could change the future design of long guns, specifically the AR type platform... The AR lowers are made of a steel or high grade aluminum (depending on manufacturer), but why couldn't it be made with a high grade polymer similar to what the Glock frame is made of? Imagine the weight loss without sacrificing the durability and dependability! Just some ideas to think about and discuss here cause I'm honestly curious about this... I do hope glocknloaded and Happysniper1 comment on this along with our many other members who are familiar with the AR system, building, and functions... Also hope that our polymer experts comment also, could be something to develop and patent, an actual Glock Forum production piece maybe?!