Tokyo Marui HK45 Tactical (Black / Tan)About HK45 HK45 is a German semi auto pistol designed 2006 and manufactured in 2007 by Heckler & Koch, in order to meet requirments set forth in the US Military Joint Combat Pistol Programme which had the purpose of arming the US Military with a . 45 ACP semi automatic pistol instead of the 9mm M9 pistol. However, this programme was suspended indefinitely in 2006 and the M9 pistol remains the standard issue pistol of the US Military, HK45 still launch