Users
- Brazil: HK33E variant.
- Chile: HK33 variant.
- Ecuador: HK33 variant.
- El Salvador: HK33 variant.
- Germany: HK53 variant.
- Ghana: HK33 variant.
- Greece: HK33E variant.
- Guatemala: HK33 variant.
- Indonesia: HK53 variant is used by Komando Pasukan Katak (Kopaska) tactical diver group and Komando Pasukan Khusus (Kopassus) special forces group.
- Iran: HK53 variant.
- Ireland: HK53 variant.
- Italy: HK53 variant.
- Luxembourg: The HK53 carbine variant is used by the Unité Spéciale de la Police intervention unit of the Grand Ducal Police.
- Malaysia: HK33E variant.
- Mexico: HK33E variant.
- Netherlands: HK33 variant.
- Portugal: HK33E variant.
- Saudi Arabia: HK33E variant.
- Senegal: HK53 variant.
- Spain: GEO unit of the Spanish National Police.
- Taiwan: HK53 variant is used by special police Thunder Squad.
- Thailand: HK33 variant. Made under license as Type 11 rifle.
- Turkey: Manufactured for the Turkish Army and Marines under a license agreement by MKEK. Indigenous T-50 rifle prototypes were seen used with HK33E rifles bodies.
- United Kingdom: HK53 variant is used by the Special Air Service.
- United States: HK53 variant is used by the US Border Patrol.
- West Germany: HK33 variant was used extensively by police and security units.
Read more about this topic: Heckler & Koch HK33