"Ed Huntress" wrote
Real AR-15s and M-16s have 7075-grade uppers and lowers. You can't
cast that with home hobby equipment.


--
Ed Huntress


You're wrong Ed , I've melted and cast 7075 in my home foundry . Now what
I can't do is heat-treat and forge it at home . I'm not sure what's
involved with forging , though I'm pretty sure Al is worked cold . Might
have to carry a billet up the road and see what my neighbor can do with his
trip hammer ... Heat-treat requires some expensive precision equipment
though .
--
Snag