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These HK-21 feed mechanism housing units are lacking the retainer piece but still serve an important purpose. Every kit will have a retainer of its own, but if you’re worried about your new build, these extra housings are the perfect way to ensure you’ve got all the chances in the world to make your HK-21 the cleanest it can be. Be confident in your new machine gun with housings for practice or replacement!
The HK21, made by H&K, and their Portuguese subcontractor FMP, was the West German evolution in firearm technology. Designed in conjunction with the MP5 and G3, the most prevalent early buyer was Portugal, who would later buy a license to manufacture the machine guns as well. Much like the G3, it fires NATO’s 7.62 x 51. The HK21s would go on to be used by Portugal until just a few years ago. It’s the bigger brother to an iconic battle rifle, reinforced and updated to serve better as an LMG.
