I remember a vice video from 2014 about 3D printed receivers that would break after about 40 rounds. Is this mag actually sturdy?
Replying to @MtnSupremacist
The updated ar lower will do minimum 600 with little/no fracturing. There are others put together with screws that’ll do thousands. 9mm ar lowers will do several thousand rounds without fault
10:34 AM - 25 Apr 2018
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