HEPHAESTUS Enhanced Buffer Kit for Umarex / KWA HK417 GBB Rifle
- CNC machined aluminum casing with spring-loaded steel weight insert.
- Increase kick, enable sharp recoil and reduce bolt carrier bounce
- Removable steel weight insert for different shooting experience.
- Drop-in replacement for original Buffer assembly.
- Suitable for Umarex ( KWA / KSC ) HK417 GBB Rifle
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