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Discussion in 'AR-15 Discussion' started by buildthedamnfence, Jun 24, 2012.
does anybody know?
I don't know for sure but nylon based composite would be a safe bet. Prolly has something in it to stiffen it up some but nylon has great tension properties.
Proprietary I'm sure, prolly similar to glock and M&P frames..... Nylon 6 reinforced with fiberglass an other additives.