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Factory Code: VIPER-M4-007
- ? Suitable for VIPER M4 GBB
- ?Includes: aluminum outer barrel, steel barrel nut, aluminum handguard, aluminum handguard nut, steel gas block, stainless gas tube, steel threaded muzzle kit and steel flash hider adapter
- Steel flash hider adapter-M14-LH
- All steel parts: full CNC machining, manganese phosphate surface treatment
- All aluminum parts: full CNC machining, coated with hard anodizing in MIL-STD
- Aluminum handguard: aluminum extrusion, full CNC machining, coated with hard anodizing in MIL-STD
- Aluminum handguard and steel threaded muzzle kit exactly copy genuine parts
- Suitable for Mk12 suppressor