PISTOL: BERETTA ARMS MODEL APX, SERIAL NUMBER A081139X, BLACK (MATTE), NOT INCLUDED, 3, 9X19, SEMI - AUTOMATIC Notes: The Beretta APX is a modular, polymer-framed, striker-fired semi-automatic pistol family introduced by Beretta in 2016, originally designed to compete in the U.S. Army's Modular Handgun System trials, with one mag as seen on images double stack .