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The HK21 is a the belt-fed iteration of the H&K roller-delayed blowback mechanism. H&K built a wide range of firearms around that system, including submachine guns (MP5), rifles (HK33, HK91), precision rifles (PSG-1), and machine guns. Originally they made a version in 5.56mm and one in 7.62mm, but later combined both guns into a single universal platform. The standardized receiver can be fitted with either magazine-feed or belt-feed mechanisms in either 5.56mm or 7.62mm, greatly simplifying H&K’s production and logistics.
This is the 7.62mm belt fed model, which was popular with clients like Portugal who used the G3 rifle but not the MG3 machine gun. It has a reputation for unrivaled reliability under terrible maintenance and harsh environments. The downside, however, is harsher recoil than most other guns I have used in its class.
Many thanks to H&K USA for providing me access to this HK21, and to Trijicon for graciously providing use of their range and their VCOG optic!
Contact:
Forgotten Weapons
PO Box 87647
Tucson, AZ 85754
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!
Items you may have missed...
The Kit of Britishmuzzleloaders: PART SEVEN – Battledress, Khaki Drill, and the 1937 Web Equipment
The 1854/67 Wänzl rifle in caliber 14x33R
Seven shot flintock pistol, 20 shot revolver and other rarities at Holt’s booth at 2019 IWA
George Hyde’s First Submachine Gun: The Hyde Model 33
Bill Ruger’s Prototype WW2 Light Machine Gun
Final Prices: RIA September 2017 Premier Auction (and what I bought!)