Description
HK51B Compact Belt Fed .308 Variant Built on the HK51 Platform
The HK51B is the fire-breathing result of an unusual idea. Originally conceived by the engineers at Vollmer and Co., the platform was built around the concept that a belt fed .308 carbine deserved a place in the HK lineage.
The 51B incorporates a feed mechanism derived from the HK21 system, allowing the platform to run linked ammunition in an extremely compact configuration. The result is a short, aggressive rifle that delivers the unmistakable character of the roller-delayed HK system in a package few people ever expect to see.
This gun is rowdy.
HK51B pistols ship with or without a brace. All NFA regulations apply.
Compact belt fed builds like this remain one of the more unusual evolutions of the HK roller-delayed platform.
SPECS
- German and US Components
- RCM 8.375″ barrel
- 41V50 CHF steel
- 15×1 thread pitch
- 1:10 twist rate
- Nitride finish
- 50-round ammo belt with starter tab included
Drum, hanger, and ammunition not included.

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