Heckler & Koch 21E/23E

Calibre 7.62/5.56mm
Weight 9300/8700g
Length 1140/1030mm
Barrel Length 550/450mm
ROF 800rpm
Magazine 100/200
Range 1200/1000m

The HK 21/23 machine-guns family emerged from original HK 21 machine-gun, that is no longer manufactured by Heckler and Koch. The HK21E, chambered in 7.62x51 mm NATO, and the HK23E, chambered in 5.56 x 45 mm NATO. The HK23E is similar to the HK21E in every respect except for the chambering and barrel length.

The most major updates over the 21A1 are a slightly lengthened receiver, a fire control block with semi-auto, 3-round bursts and full-auto modes of fire, a special bolt closing device for quiet bolt closure, and a redesigned belt-feeding mechanism (the belt feed mechanism smoothly feeds the belted ammunition in two stages, during the rearward and the forward movement of the bolt).

The ability to use G3 or STANAG (for HK23E) box or drum magazines is available with an optional feed module kit that consists of the bolt, recoil spring and belt feed module or magazine well. The HK21E has rear drum sights graduated up to 1200 meters and up to 1000 meters for HK23E; both sights are adjustable for windage.

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