HK 21- HK 21E- HK 23E- HK 11

The HK21 is a general purpose machine gun based on the G3 power rifle designed by Heckler and Koch. HK Parts has a large selection of inventory for yu HK 21, HK21E, HK23E, and HK11. Everything from barrles, extensions, sights and stocks. Shop our accessories for new and used parts.