(Hk) or "Heckler & Koch" is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 Submachine Gun, G3 Automatic Rifle, the G36 Assault Rifle, the HK416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision PSG1 Sniper Rifle. All firearms made by HK are named by a prefix and the official designation, with suffixes used for variants.