occasional reader who read something so ridiculous, he had to sign up to comment on it.
Any mechanical, industrial, or materials engineer who this MarkCO is supposed to be, would instantly smell the BS of anybody referring to injection molding as casting. It's worse than calling a mag a clip.
TLH, it's called having a life. Personally I got no dog in this, if you're the type to hang onto every word from a guy, because of some supposed authoritative title on the internet, good for you.
All levity aside; about a year ago one of the posters over on Glocktalk ran a nondestructive IR spec. on his Model 20 frame and it matched Nylon 6,6 very closely.
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