Walther CP99 — .177 CO2 Pellet Air Pistol

Walther CP99 Review — The Authentic Walther Replica

The Walther CP99 is a CO2-powered air pistol that replicates the legendary Walther P99 used by police units worldwide and fictional spies alike. Umarex manufactures this semi-automatic repeater under license, ensuring every detail matches the original — from the decocking lever and ambidextrous magazine release to the interchangeable backstrap. The CP99 features a rifled steel barrel for genuine accuracy, unlike smoothbore BB pistols, and comes in both black and striking nickel finishes. For shooters who want the look and feel of a modern service pistol without a firearms certificate, the CP99 delivers.

Walther CP99 UK — Technical Specifications

The CP99 operates on a single 12g CO2 capsule and delivers approximately 60 shots per fill at velocities of 110-120 m/s (360-394 fps). The energy output remains below 3.5 Joules, well within UK legal limits for certificate-free ownership. The 8‑shot rotary magazine drops free from the grip for quick reloading, and the pistol comes with two magazines in the box. Overall length is 180mm, weight is 710-740g, and the adjustable rear sight lets you zero the pistol for your preferred range.

Walther CP99 Real Gun — Single and Double Action Trigger

The CP99 features both single-action and double-action trigger modes, just like the real firearm. In single-action mode, the trigger is short and crisp, delivering excellent accuracy for precise shots. In double-action mode, the longer pull allows rapid follow-up shots without manual cocking. The decocking lever safely lowers the hammer without firing — a feature rarely found on air pistols at this price point. The automatic sliding safety is ambidextrous and easy to operate without shifting your grip.

Walther CP99 Accessories — Magazines and Silencers

The CP99 uses an 8‑shot rotary magazine that is compatible with approximately 11 different Umarex air pistols, including the Walther CP88, Colt 1911 A1, and Beretta M92FS. Spare magazines are available separately, and owners recommend buying at least two extras for extended shooting sessions. The threaded barrel accepts a 1/2 inch UNF silencer adaptor, allowing you to fit a standard airgun moderator. One owner successfully used a 3D-printed silencer adaptor, though they noted that careful alignment is essential to prevent pellet clipping.

Walther CP99 Problems — Honest Owner Feedback

The CP99 has received positive owner feedback on UK forums, though some issues are worth discussing. One owner reported that the standard pistol has a surprisingly loud crack that echoes across fields, recommending a silencer for garden use. The trigger can feel heavier in double-action mode, though shooting in single-action significantly improves accuracy. Another owner successfully stripped their CP99, polished internal components with 3000-grit paper and Autosol, and lubricated dry areas to improve the action. The same owner noted that the pistol arrived bone dry from the factory, so a thorough clean and lube before first use is highly recommended. Some owners have reported that aftermarket silencer adaptors can cause pellet clipping if not perfectly aligned.

Walther CP99 For Sale UK — In Stock at Fieldcraft Airguns

Fieldcraft Airguns has the Walther CP99 in stock now in black and nickel finishes. The pistol includes two 8‑shot rotary magazines, a fill probe, and a foam-lined plastic case. The CP99 Special Agent model and compact versions are available on request. Spare magazines and silencer adaptors are available separately. Due to UK law, we cannot ship this pistol directly to your home — you must collect it from a Registered Firearms Dealer, or we can deliver to your local RFD for a small handling fee. Every Walther CP99 sold by Fieldcraft Airguns comes with our exclusive 12 month warranty. We recommend adding a pack of 12g CO2 cartridges and a tin of quality .177 wadcutter pellets — RWS Hobby or H&N Excite — to your order. Add a tube of Pellgun oil to keep the CO2 seals in good condition, and a 1/2 inch UNF silencer if you plan to shoot in noise‑sensitive areas.