VFC HK416/M4 Aluminum Nozzle set

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