Belt Box Adapter
A new custom-made adapter - allows you to use HK German factory HK21E belt boxes on the HK21 older style or original style belt feds. It is a drop-in design that will...
Michael's Machines HK 21 (7.62x51/.308) Factory Style T-Rail Set
HK21 US-made rails for all HK21 builds. This is similar to the rails above, only prepped/cut for the HK21 feed mechanism.
HK Extended Cocking Handle - HK21
Rubberized extended cocking handles for the older style HK21 firearms. This extended cocking handle makes a HUGE difference when trying to charge the HK21 firearm,...
MSG-90 Style Receiver Reinforcement Left & Right Side Rail Set
Each set is new in white and an exact reproduction of the factory German HK MSG-90 side receiver rails. These rails have the...