"The GLOCK 30 Gen4 in the 45 Auto offers excellent out-of-the-box precision paired with the ballistic quality of this caliber. The Gen4 design of this small easy-to-shoot package combines a shorter trigger reach with a great magazine capacity. Glock pistols chambered for the .45 ACP (and the .45 GAP) feature octagonal polygonal rifling rather than the hexagonal-shaped bores used for models in most other chamberings. Octagonal rifling provides a better gas seal in relatively large diameter rifled bores, since an octagon resembles a circle more closely than a hexagon.The Glock 30 is a .45 ACP version of the subcompact Glock 29, with a standard magazine capacity of 10 rounds. The standard magazine includes a ""+1"" base plate, and can be made into a 9-round magazine by swapping in a flush base plate."