Knock down doors are the only reason see for having the butt plate..
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We used to design, build and inspect M16 (AR15) components for the US Government.
We inspect our parts on an advance Computerized Mitutoyo Coordinate Measuring Machine (CMM) to a sampling plan that is more ridged than our US Govt! (Ask our competitors if they check bore diameter, lug size, pivot pin position, ETC.)
In addition to over $100,000 in inspection equipment we utilize an Angstrom V950 Spectro Chemical Analyzer¡Kwhat does this mean to you? We do a destructive sample on incoming material to verify the alloy¡¦s elements are in the required range.
We perform a harness check using the latest optical impression reading device from New Age Industries.
You don¡¦t get second hand parts or overruns from RB Precision, you get Quality
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All that for a butt plate??
and Colt use plastics?
Edited to add.
doesn't it smell like some employee is making this using company equipment, maybe after hour?