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