MIL-PRF-32327, PERFORMANCE SPECIFICATION: RIFLE, CALIBER .50; SNIPER W/DAY OPTIC SIGHT AND CARRYING CASES - M107 (20 MAR 2009)., This specification prescribes the performance requirements and identifies the verification procedures for the RIFLE: caliber .50, sniper w/day optic sight and carrying cases, M107. This specification contains components as defined in section 6.6, hereafter referred to simply as M107.