MIL-DTL-63997C, DETAIL SPECIFICATION: RIFLE, 5.56 MILLIMETER - M16A2 (04 SEP 2009) [SUPERSEDES MIL-R-63997B] [NO S/S DOCUMENT]

MIL-DTL-63997C, DETAIL SPECIFICATION: RIFLE, 5.56 MILLIMETER - M16A2 (04 SEP 2009) [SUPERSEDES MIL-R-63997B] [NO S/S DOCUMENT]., This detail specification prescribes the requirements and identifies the verification procedures for the lightweight, air-cooled, gas operated, magazine-fed, 5.56 millimeter (mm) weapon designed for either three shot automatic burst or semi-automatic fire, hereafter referred to simply as the weapon.