Valuation Guides Machine Guns HK21
Published: May 26, 2025 | Updated: February 17, 2026
The HK21 is a German belt-fed general-purpose machine gun known for its modularity and use of roller-delayed blowback operation.
Curious about how much your HK21 light machine gun is worth? Whether you’re looking to sell or simply understand current pricing, we’ll help you assess the market value of your firearm.
Originally developed by Heckler & Koch in the 1960s, the HK21 is based on the G3 rifle platform and is recognized for its ability to convert between belt-fed and magazine-fed operation. It was used by NATO-aligned forces and special operations units worldwide.
Origin
Germany
Manufacturer
Heckler & Koch
Caliber
7.62×51mm NATO
Rate of Fire
800 rounds/min
Mount Type
Infantry bipod or tripod
Notable Uses
West German Bundeswehr, special operations units
Transferable HK21 light machine guns are highly sought after by NFA collectors and enthusiasts. Value is influenced by originality, condition, variant type and any unique historical markings. Most examples on the market range from $40,000 to $60,000, depending on configuration and provenance.
HK21 (Registered Receiver)
Estimated Value: $40,000 – $60,000
Market values reviewed by Chris Wing, Lead Firearms Valuation Specialist
Originality:
Transferable HK21s with original receivers, parts, and factory markings typically command higher prices due to their authenticity and appeal to collectors.
Condition:
Clean, well-maintained HK21 machine guns in excellent mechanical and cosmetic condition will sell for significantly more than worn or modified examples.
Historical Markings / Provenance:
If there are markings or provenance that link your HK21 to a specific military unit, wartime service, or historical event - collector interest and market value can greatly increase.
Restoration:
Whether your HK21 has been refinished, restored or modified will significantly affect pricing. Original finishes are typically more desirable.
Transfer Status:
Transferrable HK21s will hold a considerably higher value than their pre-86 or post-86 counterparts.
Receiver Type & Build Origin:
HK21s built on original receivers are valued higher than commercial builds, rewelds or REWATS.
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