specification CALIBER 4.5 (.177) /5.5 (.22) VELOCITY Cal. 4.5 0.5g pellet 1000fps Cal. 5.5 1.0g pellet 800fps SAFETY Automatic safety, 1-6lbf RAIL 12mm dovetail WEIGHT 3.7KG TRIGGER 4-8.5LBF L*W*H 1180X200X60 SUPPRESSER YES POWER SOURCE Gas piston /spring MANUAL DOWNLOAD