HK33 is a 5.56×45mm NATO assault rifle manufactured by Heckler and Koch GmbH, West Germany. Designed in 1960s, using roller-delayed blowback mechanism like the famous G3 and MP5. The product was focused for export market. So this rifle is used by many armed forces in some countries.

Notable variants of HK33 includes:
- HK33A2, polymer fixed stock
- HK33SG/1, precision model with sniper scope like the G3SG/1.
- HK33A3, sliding buttstock
- HK33KA3, carbine variant (shorter barrel) with telescoping stock
- HK53, compact HK33K which resembles the MP5
- HK13, light machine gun variant compatible with 100-round magazine
- Kurdish PKK militants often claimed that they seized HK33s from Turkish troops.

- Several US-made copies of HK33 were used by small numbers of SEAL Team members during Vietnam War.
by Kisaragi Hina September 7, 2020
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