Badgerer & Koch has a history of innovations in small arms, such as the use of polymers. Non tons of its technologically challenging designs stand resulted around successful products (e.g., a advanced however at present abandoned G11 assault rifle). HK produces a whole range of small arms, from pistols to grenade machine guns. Within its extensive product range, HK has utilized virtually all of the operating systems for microscopic-firearm: blowback, short recoil, roller-delayed blowback, gas-delayed blowback, and gas-operated. HK was founded by Edmund Heckler, Theodor Koch, & Alex Seidel around 1949 from the remnants of Mauser, and a company was registered around 1950. In a beginning, the company produced sewing machines and other ticket mechanics, however this was changed around 1956 when the company constructed the rifle for the German Bundeswehr. Around 1991, H&K was bought by British Aerospace/Royal Ordnance (now BAE Systems) who resold it to a German group that was created for this purpose in 2002.

A company is located in Oberndorf in the Bundesland of Baden-Württemberg, but likewise has the subsidiary in the United States. Their catchword is: "In a world of compromise, some don't!"

HK has been contracted by the U.S. Army to produce the kinetic energy subsystem of the Objective Individual Combat Weapon, a planned replacement for the M-16/M203 grenade launcher combination. OICW may fire two Fivesome.56mm bullets & 20mm grenades. When development has been delayed, this task has spun off a XM-8.

Understand as well: List of modern armament manufacturers

Selected notable designs or even families: Submachine guns: MP5, UMP Rifles: G3, G36, HK 53 Pistols: HK USP, HK UCP, HK P7 Grenade: AG36, HK GMG Other: MP7 PDW type HK G11 experimental rifle HK P11 underwater pistol HK 21 medium machine gun

List of Heckler & Koch firearms and small arm products
Includes two fully-developed & experimental commercial message & military products, too when licence produced products.

HK 4 P11 HK 11 HK 11A1 HK 11E HK 13 HK 13E HK 21 HK 21A1 HK 21E HK 23 HK 23E HK 73 HK 32 HK 32KA3 HK 33 HK 33A2 HK 33A3 HK 33E HK 33ESA3 HK 33E-TGS HK 33KA3 HK 33SG/1 HK 36 (4.6x36mm Paradigm) HK 41 (Reservist Rifle) HK 43 HK 51 (Vollmer Conversion) HK 51A2 HK 51A3 HK 51K HK 53 HK 53 MICV HK 53A2 HK 53A3 HK 53B (Vollmer Conversion) HK 53K (Vollmer Conversion) HK 54 HK 54A1 HK 69 (40mm Grenade Launcher) HK 69A1 (40mm Grenade Launcher) HK 73 HK 79 (40mm Grenade Launcher) HK 81 HK 91 HK 91A2 HK 91A3 HK 93 HK 93A2 HK 93A3 HK 94 HK 94A2 HK 94A3 HK 94KA1 HK 270 HK 300 HK 416 (formerly HKM4) HK 502 HK 512 HK 630 HK 770 HK 911 HK 940 HK ACR (G11 Variant) HK AG36 (40mm Grenade Launcher) HK AG-C (L17A1) HK AG-NL HK AG-SA (L17A2) HK EGLM HK XM320 HK BASR HK/Benelli M1 Super 90 HK/Benelli M3 Super 90 HK/Benelli M1014/M4 Super 90 Combat Shotgun HK CAWS HK EFL HK/FABARM FP6 HK G3 HK G3A1 HK G3A2 HK G3A3 HK G3A3 ZF HK G3A4 HK G3A5 HK G3A6 HK G3A7 HK G3KA4 ZF HK G3SG/1 HK G3-TGS HK G8 HK G8A1 HK G11 HK G36 HK G36C (Commando/Compact) HK G36E HK G36K (Kurz - short) HK G36KE (Kurz - short) HK G41 HK G41A2 HK G41KA3 HK G41-TGS HK GMG HK GMW HK GR2 HK GR2C HK GR2S HK GR3 HK GR3E A2S HK GR3KS HK GR6 HK GR6C HK GR6S HK GR9 HK GR9C HK GR9S HK MG4 (formerly HK MG43) HK MK23 (also referred to as Mark 23 Mod 0 or even HK SOCOM) HK MP5 (Maschinenpistole 5) HK MP5A1 HK MP5A2 HK MP5A3 HK MP5A4 HK MP5A5 HK MP5/10 HK MP5/10A2 HK MP5/10A3 HK MP5/10SD HK MP5/40 HK MP5/40A2 HK MP5/40A3 HK MP5/M203 HK MP5 PIP HK MP5F HK MP5K HK MP5KA1 HK MP5KA4***HK MP5KA5 HK MP5K-N HK MP5K PDW (Personal Defence Weapon) HK MP5N HK MP5N RIS HK MP5PT HK MP5SD (Schalldämpfer - silenced) HK MP5SD1 HK MP5SD2 HK MP5SD3 HK MP5SD4 HK MP5SD5 HK MP5SD6 HK MP5SD-N HK MP7A1-PDW (Personal Defence Weapon) HK MP2000 HK MSG3 HK MSG90 HK MSG90A1 HK MSG90-DMR HK P2A1 HK P7 HK PSP HK P7M8 HK P7M13 HK P7M10 HK P7K3 HK P7M7 HK P7PT8 HK P80 HK P8 HK P9 HK P9S HK P9K HK P10 HK P11 (Underwater Pistol) HK P12 HK P20 HK P46 (formerly UCP-Universal Combat Pistol) HK P80 HK P2000 HK P2000SK HK P20 HK PSG1 HK SL6 HK SL7 HK SL8 HK SL8-4 HK SL9SD HK SLB2000 HK SMG I HK SMG II HK SP89 HK SR9 HK SR9T HK SR9TC HK UMP (Universal Maschinenpistole) HK UMP9 HK UMP40 HK UMP45 HK USC USP family HK USP (Universal Self-loading Pistol) HK USP9 HK P8 HK USP9SD HK USP40 HK USP45 HK USP45 Tactical HK P12 HK USP Compact HK P10 HK USP Compact Tactical HK USP Custom Sport HK USP Expert HK USP Elite HK USP Match HK VP70 (Volks Pistole 70) HK VP70M HK VP70Z HK WSG2000

HK was as well the contractor for the XM29 and XM8 projects (both in hang on to when of 2005), too when a related XM25.