♦ FOR VIPER Steel Bolt Carrier of ZPARTS
♦ Full CNC machining
♦ Coated with hard anodizing in MIL-STD
♦ Recommended to use gas magazine
♦ (M3 Screw) Recommended fastening torque 1.96 N.m
♦ Please use torque wrench and threadlocker
♦ Piston bore diameter: 19mm