Umarex Heckler & Koch VP9 CO2 Powered BB Blowback Pistol. 177 caliber blowback slide air pistol is another must have Umarex replica from one of the most renowned names in the arms world. Get the same ergonomics, function, and fit from a full size replica that you can use in your garage. Getting into the action is easy with the drop free magazine that houses 18 airgun BBs along with the 12 gram CO2 cartridge. The Heckler & Koch VP9 is also equipped with a Picatinny style accessory rail located underneath the barrel. Blowback slide action True to Shape and Form Drop Free 18 Shot Magazine Powered by one 12g CO2 capsule housed in magazine HK Replica Fits Aftermarket Holsters Ideal for practice, drills, and target shooting Under Barrel Accessory Rail Fixed Front and Rear Sights FEATURES: 18-shot. 177 caliber BB air pistol with realistic blowback action Powered by a 12-gram CO2 cartridge (CO2 NOT included) Shoots. 177 caliber steel BBs at up to 350 fps Features an integrated accessory rail, full metal slide, and durable polymer frame Officially licensed H&K markings; Fixed front and rear sights. Questions about this item?