Walther CP99 CO2 4.5mm Pellet Air Pistol by UMAREX
The Walther CP99 CO2 is part of Umarex’s more premium, Germany-made range, and it shows in both finish and function. While it still looks like a service-style pistol, it’s less about acting as a strict replica and more about offering a refined, compact platform for short-range target shooting.
With a rifled barrel and rotary magazine system housed internally, it leans more towards accuracy and usability than blowback realism.
Key Features
- Rifled barrel for improved pellet accuracy
- Internal 8-shot rotary magazine system
- Single and double action trigger
- Decocking lever for safe handling
- Ambidextrous magazine release
- Interchangeable backstrap for grip adjustment
- Fast-action loading system
- Premium Umarex (Made in Germany) build quality
Performance / Use Case
This sits firmly in the “serious plinker / entry target shooter” category. Unlike blowback pistols that prioritise realism, the CP99 is built to be consistent and controllable.
The rifled barrel makes a noticeable difference compared to BB pistols or blowback pellet hybrids, giving it better grouping potential at shorter distances. The internal rotary magazine keeps the profile clean and reduces the bulk you sometimes get with stick mags.
It’s best suited for controlled target shooting rather than casual plinking or realism-focused use.
Build & Design
At 710g, it has a solid but manageable weight, and the compact 180mm length makes it easy to handle. The grip system is more refined than most CO2 pistols in this class, with interchangeable backstraps allowing a better fit for different hand sizes.
Controls are laid out in a more “service pistol” style, with a decocking lever and ambidextrous magazine release adding to usability rather than just visual realism.
Being part of the Umarex premium German-made line, the fit and finish are generally a step above standard entry-level CO2 pistols.
Specifications
- Power Source: 1x 12g CO2
- Calibre: 4.5mm (.177) pellet
- Magazine Capacity: 8 rounds
- Shot Capacity: approx. 60 shots
- Trigger: Single / Double Action
- Safety: Sliding safety
- Length: 180 mm
- Weight: 710 g
The CP99 is best thought of as a compact entry into proper pellet pistol shooting rather than a realism-focused replica. It trades blowback theatrics for consistency and accuracy, and that’s exactly what it’s supposed to do.
If you want a straightforward, well-built CO2 pistol that leans towards actual shooting performance rather than just feeling like a replica, this is one of the more sensible options in its class.
