Brass Comparator
thingiverse
DESIGNER ASSUMES NO LIABILITY WHATSOEVER. IMPROPER HEADSPACING CAN LEAD TO DEATH, INJURY, LAWYERS, AND EXPLODING GUNS. USE AT YOUR OWN RISK! Does not measure any design spec (e.g. SAAMI) For comparing shoulder height between casings only. 4 M3x7 screws (or comparable) are required.
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