Automatkarbin 4

Automatkarbin 4
An Ak 4 with magazine removed
Type	Battle rifle
Place of origin	Sweden West Germany
Service history
In service	1964–present
Used by	See Users
Wars	War in Afghanistan
Production history
Designer	Heckler & Koch
Designed	1950s
Manufacturer	Husqvarna Vapenfabrik Carl Gustafs stads gevärsfaktori
Produced	1965–1985
Variants	See Variants
Specifications
Mass	4.1 kg (9.04 lb)
Length	1,045 mm (41.1 in)
Barrel length	450 mm (17.7 in)
Width	45 mm (1.8 in)
Height	220 mm (8.7 in) with inserted magazine
Cartridge	7.62×51mm NATO
Action	Roller-delayed blowback
Rate of fire	500–600 rounds/min
Muzzle velocity	800 m/s (2,625 ft/s)
Effective firing range	500 metres (547 yd) 200–500 metres (219–547 yd) sight adjustments 100–600 metres (109–656 yd) with optics
Maximum firing range	3,700 metres (4,046 yd)
Feed system	20-round detachable box magazine.
Sights	Rear: rotary diopter; front: hooded post

The Automatkarbin 4 (Ak 4; lit. 'Automatic Carbine 4') is a license-built Swedish version of the West German Heckler & Koch G3 battle rifle. It was adopted as the service rifle of the Swedish Armed Forces in 1965, replacing the bolt-action m/96 Mauser, the self-loading automatgevär m/42 and the automatic rifles Kulsprutegevär m/21, Kulsprutegevär m/40.^{[citation needed]}

The initial Ak 4 incorporated some minor modifications compared to the original G3 design, including a 20 mm (0.79 in) longer buttstock, a serrated thumb groove on the bolt carrier to aid in silent bolt closure, a heavier recoil buffer for increased reliability and a 200-500m rotary diopter rear sight.^[1]

The Ak 4 was manufactured from 1965 to 1985 by both Carl Gustafs stads gevärsfaktori in Eskilstuna and Husqvarna Vapenfabrik in Huskvarna.

It was replaced as the standard-issue service rifle in 1985 by the Ak 5, a license-built version of the FN FNC, but remains in use with the Home Guard and in specialist marksman roles within the regular armed forces.