Army Force Steel Hammer Set for WA M4 GBB (Type 2)

Army Force Steel Hammer Set for WA M4 GBB (Type 2) Steel Construction Suitable for WA M4 Series Airsoft Gas Blow Back GBB Rifle For smoothness, speed and durability Package Include Steel Hammer x1, Full Stroke Hammer Spring x1, Hammer Bearing x1, As always, upgrading Airsoft Gun require necessary skill & technique to dissemble the gun, consult expertise if needed