HK51 for Sale
Browse hk51 listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The HK51 is a semi-automatic rifle developed by Heckler & Koch, blending the features of the G3 battle rifle and MP5 submachine gun. It offers compactness and reliability, designed for versatile use. Though discontinued, the HK51 remains popular among collectors and enthusiasts.
Why It's a Top Choice
- Compact design ideal for close quarters
- Reliable roller-delayed blowback action
- High-quality German manufacturing
- Interchangeable magazines with G3
- Strong collector demand despite limited production
Key Variants
HK51A1
The HK51A1 features a fixed stock, favored for traditional rifle handling with compact dimensions.
HK51A2
The HK51A2 has a folding stock suited for tactical mobility and easier storage.
Competitor Comparison Table
| Feature | HK51 | Colt AR-15 | FN SCAR |
|---|---|---|---|
| MSRP | Discontinued; varies | $900 - $1,500 | $2,000 - $3,000 |
| Capacity / Size | 20-round G3 mags / Compact | 30-round STANAG mags / Rifle length | 20- or 30-round mags / Modular |
| Weight | Approx 8.2 lbs | Approx 6.5 - 7.9 lbs | Approx 6.9 - 8.7 lbs |
| Optics-Ready | Limited | Standard Picatinny rail | Modular optics mounts |
| Trigger Type | Roller-delayed blowback | Direct impingement | Gas piston |
| Notable Pro | Robust build and accuracy | Widely supported aftermarket | Advanced modularity |
| Notable Con | Hard to find parts | More recoil | Higher price |
Best Use Cases
- Collectors appreciating unique designs
- Home defense in compact form factor
- Range practice for roller-delayed blowback rifles
- Light tactical applications
FAQs
Can I use standard G3 magazines with the HK51?
Yes, the HK51 accepts standard 20-round G3 magazines, offering magazine compatibility and ease of sourcing.
What caliber does the HK51 fire?
The HK51 fires 7.62x51mm NATO cartridges, a common caliber for battle rifles and battle rifle derivatives.
How does the HK51's action operate?
It uses a roller-delayed blowback system, known for smooth cycling and reliable performance under various conditions.
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HK HKV1 .45 ACP 4.46" Night S MS Black 1
$819.00
HK HKV1 .45 ACP 4.46" Night S MS Black 1
$886.99
