Huben GK1 — Semi-Automatic PCP Air Pistol

Huben GK1 Review — True Semi-Auto PCP Performance

The Huben GK1 is a semi-automatic pre-charged pneumatic air pistol that stands alone in the market . Unlike traditional bolt-action or side-lever PCP pistols, the GK1 cycles automatically with each shot, allowing rapid follow-ups without breaking your aim . The action derives from Huben’s acclaimed K1 rifle platform, re-engineered into a compact 325mm pistol weighing just 1.2kg . Available in .177, .22, and .25 calibre, the GK1 delivers adjustable power for applications ranging from backyard plinking to serious pest control . An ergonomic walnut grip and iron sights come as standard, with a dovetail rail for optics mounting .

Huben GK1 UK — Legal Versions and Model Variants

The UK market has specific requirements for air pistols, which must remain under 6 foot-pounds of muzzle energy. Early GK1 V1 models were “unstable” at sub-6 levels, leading Huben to develop dedicated UK-legal versions . The current V3-R is an unregulated model modified internally to achieve stable sub-6 performance across all calibres . The V3+R (Wolfiek regulated) achieves sub-6 via an aftermarket regulator fitted by the Spanish distributor . Both versions are fully UK legal and require no firearms certificate. The standard V3 .177 model is also stable below 6ft/lb without regulation .

Huben GK1 Specifications — Power and Shot Count

The GK1 fills to a maximum pressure of 300 bar, with the semi-automatic action delivering consistent performance across the pressure curve . The gun’s unique “blow-open” valve system provides impressive shot-to-shot consistency even without regulation . One unregulated .25 calibre GK1 produced 19 shots at 30ft/lb with single-digit deviation, while a regulated .25 calibre achieved 105 shots at 12ft/lb with near-identical consistency . The power adjuster wheel lets you tune from low-energy plinking up to full power with a simple turn . The 19-shot rotary magazine is reliable with quality pellets, though some owners report jamming with certain slug profiles .

Huben GK1 Problems — Honest Owner Feedback

The GK1 has received extensive owner feedback, with several common issues worth discussing. Jamming is the most frequently reported problem — one owner stated that no one can avoid a jam with this pistol, though clearing it is straightforward with basic disassembly . The gun is not recommended for shooters unwilling to open up a PCP pistol. Some barrels arrive with burrs on the leade or crown, causing accuracy issues out to just 10 yards; owners have resolved this with gentle polishing . The barrel-to-magazine alignment may require adjustment for optimal slug performance, a process that takes patience but yields 2 MOA accuracy at 100 yards . The fill ports are uncovered, easily fixed with tape, and the grip design could better manage muzzle flip . For the mechanically inclined, the GK1 is a fantastic platform; for those who prefer plug-and-play, it may frustrate.

Huben GK1 Accuracy — What Owners Achieve

With proper setup, the GK1 produces exceptional accuracy for a pistol. One owner achieved 2-3 inch groups at 120 yards with AVS slugs at 36ft/lb using a folding stock and mini tripod . The gun’s lightweight and pointable nature make it ideal for reactive target shooting and pest control requiring quick follow-ups . At lower power settings, it transforms into a 7.5ft/lb plinker shooting lead-free pellets for extended sessions . The adjustable power wheel gives you two clips of consistent shots at 36ft/lb and two clips at 7.5ft/lb from a single fill . After barrel work and alignment, owners report the GK1 punches well above its class .

Huben GK1 For Sale UK — In Stock at Fieldcraft Airguns

Fieldcraft Airguns has the Huben GK1 in stock now in .177, .22, and .25 calibre. We offer the V3-R (unregulated, sub-6 stable) and the V3+R (Wolfiek regulated) models depending on availability. The pistol includes a walnut grip, iron sights, dovetail rail, hard case, and fill probe . Accessories such as compact red dot sights, folding stock adapters, and Huma-Air regulator kits are available separately . Every Huben GK1 sold by Fieldcraft Airguns comes with our exclusive 12 month warranty. We deliver to your nominated Registered Firearms Dealer for collection, as required by UK law. We recommend adding a high-pressure compressor or stirrup pump capable of 300 bar fills to your order. Also add a supply of quality pellets — H&N Field Target Trophy or JSB Exact — and a tube of silicone oil for the fill probe seals. For owners wanting to use the GK1 as a carbine, we can advise on suitable folding stock adapters and optics.