Zparts Viper M4 Complete Bolt Carrier (VLTOR)

FOR VIPER M4, SR15, SR16

• Includes: steel bolt carrier, aluminum nozzle set, disassemble heavier mass, steel nozzle guide
• Steel Bolt Carrier and Steel Nozzle Guide: Fully CNC machined with manganese phosphate surface treatment
• Aluminum Nozzle Set: Fully CNC machined and 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
• Recommended to use gas magazine
• For airsoft use only