Gamo GX-40 — Lightweight PCP Air Rifle

Gamo GX-40 Review — Lightweight PCP Performance

The Gamo GX-40 is a pre-charged pneumatic air rifle that combines a lightweight synthetic thumbhole stock with the proven BSA action and cold-hammer-forged barrel . Available in .177 and .22 calibre, the GX-40 features a 10-shot rotary magazine, a two-stage adjustable trigger, and a threaded 1/2 inch UNF muzzle for silencer attachment . The rifle is made in the UK by BSA in Birmingham, giving it the same barrel and action quality as more expensive British PCPs at a fraction of the price . Weighing just 6.7 lbs un-scoped and with an overall length of 37.25 inches, the GX-40 is one of the lightest full-sized PCPs available, making it ideal for hunters who cover a lot of ground .

Gamo GX-40 UK — Specifications and Shot Count

The Gamo GX-40 UK market receives the rifle in sub-12 ft/lb configuration for certificate-free ownership. Maximum fill pressure is 232 bar, and the rifle delivers approximately 60-70 shots per fill depending on calibre and pellet choice . Barrel length is 18.5 inches, and the rifle features a manometer (pressure gauge) at the end of the main cylinder, with a snap-on plastic collar protecting the fill port . The synthetic thumbhole stock is ambidextrous with textured grip panels on the grip and forend, and the rifle is available in both .177 and .22 calibre . The trigger is the two-stage adjustable CAT (Custom Action Trigger), and the manual safety catch is located forward of the trigger blade .

Gamo GX-40 Accuracy — Pellet Testing Results

In expert testing by Shooting UK, the GX-40 produced exceptional accuracy with the right pellet choice. The best five-shot groups at 30 yards measured 3.9mm centre-to-centre using H&N Baracuda FT pellets, with an average group size of 6.5mm . Over the chronograph, the same pellets produced an average velocity of 704 fps with an astonishing velocity spread of just 4.1 fps, demonstrating remarkable consistency for an unregulated PCP . At 40 yards, groups opened to 2.5cm to 3cm, leading the reviewer to recommend a maximum hunting range of 35 yards . The GX-40 performed well with several pellet types including Air Arms Diabolo Field, Rangemaster Sovereign, and Weihrauch Magnum, though Baracuda FT was the clear favourite .

Gamo GX-40 GX-250 and GX-40 Differences

The GX-40 and GX-250 share the same action, barrel, stock, and trigger, with the only difference being the air cylinder length . The GX-40 has a shorter cylinder, delivering 60-70 shots per fill, while the GX-250 has an extended cylinder delivering approximately 120-135 shots per fill . The GX-250 is also available as a package including a 3-9×40 scope, silencer, and fill probe, whereas the GX-40 is typically sold as a rifle-only option . The Venari and Coyote models share the same action as the GX-40, differing only in stock design and barrel length .

Gamo GX-40 Problems — Honest Owner Feedback

The GX-40 has received extensive owner feedback on UK airgun forums, with several common issues worth discussing. The most frequently reported problem is magazine cycling issues, with one owner reporting that the magazine would sometimes snag and on occasion not even cycle around to the next pellet . A loose magazine location plate has also been reported, with one owner finding that pressing the plate in solved loading problems . The fill valve can fail — one owner reported that after three weeks, the fill valve failed, and the dealer was good as gold when I said I’d lost all confidence . The cocking action can be sticky on new rifles, with owners recommending a positive cocking action is needed to ensure everything had set correctly — a half-hearted approach may result in the magazine cycling but the hammer and trigger not setting . On the positive side, owners report that Gamo warranty service is helpful and quick to deal with, and a good Gamo is a pleasure to own and for the money the accuracy can’t be questioned .

Gamo GX-40 Package and For Sale UK — In Stock at Fieldcraft Airguns

For those searching for a Gamo GX-40 for sale UK, Fieldcraft Airguns has the GX-40 available in .177 and .22 calibre. The rifle includes one 10-shot magazine, a muzzle brake, and fill probe. The GX-40 is also available as a Gamo GX-40 package with scope and silencer from selected retailers . Spare 10-shot magazines are available separately, with the .177 magazines featuring a blue rotor and the .22 magazines featuring a red rotor . Owners recommend buying at least one spare magazine for field use and tapping the magazine after filling with pellets to help with feed issues . Every Gamo GX-40 sold by Fieldcraft Airguns comes with our exclusive 12 month warranty and delivery straight to your door. We recommend adding a tin of quality pellets — H&N Baracuda FT or Air Arms Diabolo Field for best accuracy — and a stirrup pump or air tank if you are new to PCP ownership .