Shortened name for Hechler and Koch, a European firearms manufacturer. This company's products cover a wide range, but in popular culture (movies/books) the MP-5 submachine gun is most frequently seen..."Navy Seals" and various Steven Seagal movies are the most common examples.
The SWAT guys were rapelling down the side of the structure with their H & Ks slung across their chests.
by Lawman October 17, 2003
2 more definitions
Heckler & Koch. German gun manufacturer
Most SF teams use H&K Submachine guns.
by Corporal October 25, 2006