It looks like G&G Armament's Xtreme 45 CO2 Pistol got an upgrade and Jon of Airsoft Megastore tells you more about it... "If you are looking for an affordable 1911 style CO2 that has all the tactical features you need take a look at the Xtreme 45 by G&G. This 1911 style features a full metal construction, tactical under rail, 16 round magazine and an adjustable hop up."