CO2 pistols have come a really long way over the years and now they simulate firearms in so many ways that they've become an integral part of maintaining your shooting proficiency. The Umarex T.D.P. 45 CO2 pistol has a 19rd drop-free magazine that you fill with inexpensive steel BBs. Compare that to the cost of firearm ammo! You can shoot all weekend and still not spend as much as you would on a box of 50 firearm cartridges. Get a BB speedloader and shorten the reloading time and extend the shooting fun.