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Reader Survey >Walther CP88 Review: A Classic CO2 Pellet Pistol
- Last updated: 13/08/2025
The Walther CP88, on test here, is something of a landmark model for Umarex, since it was the first pellet-firing CO2 pistol made by them. I’m no fan of BBs, mainly because they are never particularly accurate and are often a menace due to their propensity to ricochet all over the shop. So yes, I really appreciate this model, which opens the door for enthusiasts to own something more sophisticated and reliable.
Umarex, remember, is the largest manufacturer licensed to produce a variety of airguns as replicas of famous firearm brands, and the CP88 is a prime example: a visually faithful replica of the Walther P88 firearm. The replica aspect undoubtedly adds an extra dimension for many enthusiasts.
A smart, compact hard case is included, and inside you’ll find:
The all-metal construction, save for the synthetic grip panels, makes for a robust-feeling pistol, and at 2.3lbs in the hand, this Walther really feels the part. This is the 3.5” black model, which denotes the barrel length, and there’s also a Nickel-finish version and a 5.6” version. The matte black finish looks both smart and authentic, and all the components look and feel well-made.
Power, as mentioned, comes from a 12g CO2 capsule stored inside the grip. So let’s gas up and get started. First, press the knurled button sitting just forward of the grip on the right-hand side (what would be the mag release on the real version). This lifts the left side of the grip, which can now be pulled away. Next, pull down the cartridge lock bar at the base, insert a fresh CO2 capsule into the chamber, and wind up the circular tensioner finger-tight. Finally, push back up the cartridge lock, which will now pierce the capsule. Don’t be too shy with the tensioner, as this needs to be properly nipped up so that the cartridge lock can do its job. Be positive, and it all works well.
To fill the magazine, first check it is the correct way round (stating the obvious, I know), with the central raised guide teeth uppermost. Push home a pellet into all eight chambers, ensuring they are at least flush. On test, I made a note of my findings, and the magazine favours short-bodied pellets, such as JSB Exact RS Diabolo. Secondly, I found that it paid to gently seat each one using the head of the next pellet. This then ensures smooth cycling. Now, at this stage, before we proceed, apply the manual ambidextrous safety at the rear of the top slide. I mention this because, due to the short barrel, it’s very easy to end up with it resting in the palm of your hand. To avoid any possible incident, it’s a clear case of safety first! Now, press down the slide release lever, just above the trigger on the left side, and the front slide section will fly forward to expose the breech. Drop in the full magazine and it should find its position. Close up the action, and we’re ready to go.
The Walther CP88 comes fitted with a fixed blade up front and a windage-adjustable rear sight. The small Allen key supplied deals with adjustment, via the tiny socket screw holding the rear notch section in place. The sight picture created by the post and notch works well, but with no colour on the elements, I would add a dash of white paint or Tippex to the foresight, at least if it were my own pistol, as it helps enormously. Admittedly, my eyesight is naturally on the slow decline, but this is an easy improvement that costs nothing.
Power with this style of CO2 pistol is, let’s face it, fairly irrelevant, as the emphasis is on enjoying the process and the rapid-fire rate! But for the record, with a fresh capsule on board, I clocked around 429fps using the JSB Exact RS Diabolos (7.33gr), so around the 3ft/lbs mark. Mid-charge, the velocity dropped to the 300fps mark, and as far as total shot count, it’s surprising just how much that varies with different makes and models, from the same standard 12g CO2 capsule. Umarex states a shot count of 60, and I got almost exactly that before noticing a longer delay in the shot reaching the target.
The CP88 can be shot single or double action, and as usual, accuracy will be marginally better when the hammer is pulled back and set since the trigger has less to overcome. For accuracy, think in terms of groups the size of a Coke can base at 10 yards, and you won’t be disappointed. That translates to plenty of fun when shooting rapidly at tin cans, similarly sized spinners, and the like.
So yes, the CP88 met with my approval. Solid, well-machined, great-looking, and satisfyingly functional in operation. Factor in the replica credentials, and it’s a Walther with plenty to offer enthusiasts across the board.
Thanks to Range & Country Shooting Supplies in Sleaford, Lincs., for the kind loan of this pistol.
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