Prometheus EG Barrel 407mm for M4A1/ SR16/ SG551+ Accessory-Type_Buttstock The system is also the

The system is also the exclusive 2018 new design of GHK

our barrels can provide the smoothest inner barrel surface and a reinforced structure

Reinforce extension tube reduce the buffer system abrasion and fault

Box Includes 5 Pieces of Magazines

Suitable for AK74 Series Airsoft Gas Blow Back GBB Rifle

Prometheus EG Barrel 407mm for M4A1/ SR16/ SG551+ Accessory-Type_Buttstock The system is also thePrometheus EG Barrel 407mm for M4A1 SR16 SG551+ For M4A1 SR16 SG551+ Airsoft Electric Gun (AEG) Rifle High grade precision barrel at 6. 03mm diameter for extra power and precision shooting Choose this barrel to suit your AEG model For custom upgrade user, you can choose a longer barrel PROMETHEUS EG Barrel by LAYLAX (JAPAN) NOTE: You can always choose a longer Barrel if you have a extended Outer barrel installed