Caliber 9mm Luger (Parabellum) .357SIG Length, overall 7.7" 7.7" Height, overall 5.5" 5.5" Width, overall 1.5" 1.5" Barrel length 4.4" 4.4" Rifling twist 1 in 10" 1 in 16" Rifling grooves 6 6 Sight radius 6.3" 6.3" Weight w/o magazine 26.5 oz 30.1 oz. Weight, empty magazine 3.4 oz 3.4 oz. Trigger pull weight (lbs) DA/SA 12/4.5 DA/SA 12/4.5 Muzzle energy* 368 ft/lbs 368 ft/lbs Magazine capacity 10 rounds** 10 rounds*** * Depending on ammunition ** 15-round magazines available to law enforcement personnel only *** 12-round magazines available to law enforcement personnel only