Product Details
HK full-auto sear spring and roller. This original HK part is correct for all HK9x full auto packs including: HK G3, HK33, MP5, MP5K, HK21. This spring can be modified for use in semi auto packs.
HK full-auto sear spring and roller. This original HK part is correct for all HK9x full auto packs including: HK G3, HK33, MP5, MP5K, HK21. This spring can be modified for use in semi auto packs.