The OA Defense OA-2311 Full Size is a single-action, semi-automatic 2011-style pistol chambered in 9x19mm with a 5-inch barrel and an optics-ready slide. It has a 7075 aluminum frame paired with a polymer grip module, and its double-column magazine design gives it a 17+1 capacity. The slide accepts several red-dot footprints through included mounting plates while retaining a rear iron sight for backup aiming if the optic is removed. The pistol is finished in black and comes with an ambidextrous manual safety for use from either side of the frame.