H&K's Middle Child: The HK33 and HK53 in 5.56mm
30:41
This MP5 Is Chambered In 5.56? The HK53
11:43
HK43: The 5.56mm "Paramilitary" Rifle
19:57
H&K G36: Germany Adopts the 5.56mm Cartridge
26:13
American HK33 knockoffs - the C93 (by PTR) to 500yds: Practical Accuracy
16:10
HK-32 Prototype in 7.62x39mm
8:06
H&K MP5SD: The Cadillac of Suppressed Submachine Guns
17:58
Heckler & Koch's Modular Machine Gun: the HK21E
19:46