Heckler & Koch HK33 - Variants

Variants

HK33A2

Variant with a rigid synthetic stock.,

HK33SG/1

An accurized model; equipped with a telescopic sight and improved trigger analogous to the one used in the G3SG/1.

HK33A3

Standard rifle but with telescoping metal stock.

HK33KA3

Carbine version with barrel reduced in length to the base of the front sight post; also equipped with a folding metal stock. Due to the short barrel, the HK33KA3 cannot be used to launch rifle grenades or mount a bayonet.

HK53

Compact version of the HK33K. Has a short, 211 mm barrel, a forearm derived from the MP5 submachine gun and a telescopic shoulder stock or receiver endplate cover (later models also received a four-prong flash hider). Despite using 5.56mm rounds, it is officially classified as a sub-machine gun.

HK13

Light machine gun. It is fed from either box or drum magazines (the latter has a 100-round capacity), has a quick-change heavy barrel for sustained fire, shrouded with a sheet metal heat guard (replacing the synthetic forearm) and a 2-point bipod adapter.

Type 11

A derivative of the HK33 manufactured in Thailand by the Ministry of National Defence for use by the Thai armed forces. A bullpup variant also exists with M16 sights and foregrip for close combat in jungle environments.