Umarex MORPH 3X Uses a 12-gram CO2 cartridge Non-removable 30rd BB magazine Double-action only Fixed fiber optic sights Adjustable power 2 integral Weaver/Picatinny rails Pistol specs: 380 fps, 4.5 barrel, 11.5 overall length, 1.5 lbs. Rifle specs: 600 fps, 12 barrel, 38.5 overall length, 2.5 lbs., 15 length of pull Includes pistol, detachable skeletonized shoulder stock, forearm (attaches to lower Weaver rail) and barrel extender ... 600 fps with barrel extender, 380 fps without it. Converts from pistol to carbine to rifle!...