Train In Your Back Yard (where allowed)! This BB replica is not only a great BB gun for some fun plinking, but also makes a great target shooting and training pistol for S&W M&P firearm owners. The M&P 45 Air Pistol is a pellet/ BB repeater powered by one 12g CO2 cylinder that hides in the grip of the BB pistol. An integrated accessory rail underneath the muzzle is a great place to add a tactical flashlight or an airgun laser. The Smith and Wesson M&P 45 CO2 pistol has a manual safety, double-action trigger that's amazingly close to the actual handgun, and fixed front and rear yellow 3 dot sights.