Product Details
RCM HK STYLE .40/10MM CAL BOLT HEAD ASSEMBLYThe RCM Hk Style .40 Bolt Head is the real deal for when its time to replace your out of spec, worn or broken bolt heads or for that custom build. Each bolt head will work and fit on semi or full auto MP5 40,10mm pistol or rifles. Each bolt head is made from ordnance grade steel. Machined and Heat Treated to exact HK Specs.
