Zastava M21

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Zastava M21
M21 A assault rifle
Type Assault rifle, submachine gun
Place of origin  Serbia
Service history
Used by See Users
Production history
Designer Marinko Petrović[1]
Manufacturer Zastava Arms
Produced 2004-present
Number built 50,000+
Variants See Variants

4.15 kg (9.1 lb) (M21 A)

4.07 kg (9.0 lb) (M21 S)

3.91 kg (8.6 lb) (M21 C)

1,000 mm (39 in) stock extended, 750 mm (30 in) stock folded (M21A)

915 mm (36.0 in) stock extended, 666 mm (26.2 in) stock folded (M21S)

825 mm (32.5 in) stock extended, 575 mm (22.6 in) stock folded (M21C)
Barrel length

460 mm (18 in) (M21 A)

375 mm (14.8 in) (M21 S)

325 mm (12.8 in) (M21 C)

Cartridge 5.56×45mm NATO
Action Gas-operated (rotating bolt)
Rate of fire 680 rounds/min
Muzzle velocity 925 m/s
Effective firing range 450 m (490 yd) with iron sights
600 m (660 yd) with optics
Feed system 30-round detachable box magazine
Sights Adjustable iron sights, optional mount required for optical sights

The Zastava M21 is a series of 5.56mm firearms developed and manufactured by Zastava Arms.[2]


The M21 is based on the AK-47 Kalashnikov principle, chambered in the 5.56×45mm cartridge.[3] The current models use a 1.5mm thick stamped receiver, while a future model will feature an improved receiver of 0.9mm thickness to achieve a considerably lighter weight. Like many modern assault rifles, the M21 can incorporate picatinny rails for mounting accessories like optics, vertical grips, bipods, etc.

The Zastava M21 is gas operated with a rotating bolt locking system.[3] It features a hard chromium-plated, cold forged standard rifled or an optional polygonal rifled barrel, integrated 22mm flash hider grenade launcher, rigid polymer folding stock, heavy-duty synthetic handguard with an additional left hand side fire selector, cover mounted picatinny rail for optical sights. The rifle can also mount a 40mm under-barrel grenade launcher.[3] It has a magazine capacity of 30 rounds. The cyclic rate of fire is 680 rounds per minute, and the sustained rate of fire is 120 rounds/min.[3]


The regular barrel has six grooves with a right-hand twist. An octagonal polygonal version is also available and has four grooves with a right-hand twist (M21B). Barrels are also hard chrome plated to provide a longer service life.[4]

The rifle has conventional iron sights that consist of a front post and a flip-up rear sight with 300m and 500m apertures. A set of picatinny rails on the hand guard can mount various optoelectronic devices. The M21 is a modular weapon, with configuration dependent on the task and mission.

Optical sights:

  • ON M04 "TELEOPTIK and
  • ON M04A "ZRAK"

Optoelectronic devices:

  • Reflex sight, M04 "MARS"
  • Bookmark target laser M04A-AIM2000
  • Passive monocular M04 MINI N/SEAS
  • Passive sight PN 3x50 "SOVA"
  • Bookmark laser target M04 "INFIZ"
  • Passive monocular MINI N/SEAS combined with reflex sight M04 "MARS"


The M21 comes in several assault rifle and carbine variants:

  • M21 A – Standard baseline assault rifle.[5]
  • M21 S – Compact short barrel assault rifle.[6]
    • M21 SBS – Built-in picatinny rail system.
  • M21 – Carbine.[7]
    • M21 BS – Built-in picatinny rail system.


Previous users[edit]

See also[edit]


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