The ammo I use with my Walther PPQ M2 T4E .43caliber Co2 pistol is 'riot-ball' made of PVC/nylon and these very smooth & hard Riot-Balls are blasted out the PPQ's barrel with an average of over 410 fps!!! I don't paintball, and was not planning on owning this pistol until I came across the reuaseable Riot-Balls. The pistol is well made and looks & feels very close to the cartridge firing models. The tri-dot sights are perfect for fast target acquisition, and the grips and trigger as well as the oversized trigger guard all add up to a very comfortable fit when holding and shooting this PPQ M2 T4E. As far as AirGuns go, this is a "big bore" air pistol, that, when paired with the Riot-Ball .43caliber ammo, makes one helluva co2 plinker. I stuff a box with old denim jeans, and tape paper targets to the sides of the box. Most, or all of the Riot-Balls can be collected from the box, and washed off for use another day. The PVC/nylon balls will break up if shot at solid hard metal, but nothing else seems to affect them.