Gunnery Sergeant M Shrek was the designated marksman of SRD Regal One-Three, and as expected, was renown for his sniping abilities. He was also notable for his strength and being the burliest member of the squad. Freeman notes that if he were any better, he'd be a SPARTAN. Shrek was the member of the team to hold out longest against David and John during their confrontation, before he was finally killed by John-117 who beat him to death with his own Sniper Rifle.