MIL-DTL-63997D, DETAIL SPECIFICATION: RIFLE, 5.56 MILLIMETER - M16A2 (08-AUG-2019)

MIL-DTL-63997D, DETAIL SPECIFICATION: RIFLE, 5.56 MILLIMETER - M16A2 (08-AUG-2019)., Reactivated after 22 March 2019 and may be used for new and existing designs and acquisitions. 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.