The Smith & Wesson(r) M&P (Military & Police) CO2 airgun pistol is a replica pistol based on the S&W Military and Police firearm. It's a BB repeater powered by one 12g CO2 cylinder that hides in the grip. An integrated accessory rail underneath the muzzle is a great place to add a tactical flashlight or an airgun laser. An element of realism is added with a 19-shot drop-out BB magazine.