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Updated plate stack lower pdf drawing, changed 4mm to 5mm thickness on sheet 6. Those parts won't work at 4mm thick aluminum. Can also use 3/16" thick there but will need a shim between the front takedown pin brackets and the side plates.
LBRY Tags: lower; receiver; plate stack; ar15; diy
LBRY Tags: lower; receiver; plate stack; ar15; diy