HK-21   

HK21 .308 belt fed machinegun. This is gun began life as a Ballistics (the best HK conversions) registered receiver. The gun was later
converted to an HK21 by Vollmers, I was told by the previous owner that this was one of the last guns that Terry Dyer built before he left
Vollmers so you know it was put together right!! Gun comes as pictured w/ bi-pod, verticle front grip, Navy 4 position & 3 rb lower.

 
Click on the thumbnail images below for  better look.