M21A assault rifle
|Type||Assault rifle, submachine gun|
|Place of origin||Serbia|
|Used by||See Users|
|Weight||M21A: 9.15 lb (4.15 kg)|
|Length||M21A: 39.37 in (1,000 mm) (extended stock) |
29.52 in (750 mm) (folded stock)
|Barrel length||M21A: 18.1 in (460 mm)|
|Action||Gas-operated (rotating bolt)|
|Rate of fire||680 rounds/min|
|Muzzle velocity||925 m/s|
|Effective 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 M21 is based on the AK-47 Kalashnikov principle, chambered in the 5.56×45mm cartridge. 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. It features a hard chromium-plated, cold forged standard rifled or an optional polygonal rifled barrel, integrated 22mm flash hider grenade launcher, rigid metal 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. 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.
- conventional barrel (Zastava M21)
- polygonal barrel (Zastava M21B)
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.
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.
- ON M04 "TELEOPTIK and
- ON M04A "ZRAK"
- 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"
- M21A – Standard baseline assault rifle.
- M21ABS – Built-in picatinny rail system.
- M21S – Compact short barrel assault rifle.
- M21SBS – Built-in picatinny rail system.
- M21 – Submachine gun model.
- M21BS – Built-in picatinny rail system.
- Armenia - Used by Armenian special forces
- Azerbaijan - Used by Special Forces 
- Bosnia and Herzegovina - Used by federal (SIPA) and special police units.
- Cameroon - Special Police Forces.
- Iraq - Iraqi Armed Forces, Private security contractors, Multinational force.
- Macedonia - Purchased in 2005.
- "Patente proglasili kopijom" (in Serbian). Glas javnosti. http://arhiva.glas-javnosti.rs/arhiva/2004/11/13/srpski/RG04111201.shtml.
- "M21 deo naoružanja Vojske Srbije" (in Serbian). B92. 10 February 2008. http://www.b92.net/info/vesti/index.php?yyyy=2008&mm=02&dd=10&nav_category=9&nav_id=284297.
- "Oružari ipak izvoze u Jermeniju" (in Serbian). B92. 29 December 2006. http://www.b92.net/biz/vesti/srbija.php?yyyy=2006&mm=12&dd=29&nav_id=225422.
- "Snajperi iz Zastave za Jordan i Indoneziju" (in Serbian). Blic. 12 January 2011. http://www.blic.rs/Vesti/Tema-Dana/228720/Snajperi-iz-Zastave-za-Jordan-i-Indoneziju.
- "So lucky to survive bomb horror". Wales Online. 14 September 2008. http://www.walesonline.co.uk/news/wales-news/2008/09/14/so-lucky-to-survive-bomb-horror-91466-21813429/.
- "NATO vojnici nose srpske puške" (in Serbian). Blic. 28 February 2008. http://www.blic.rs/Vesti/Drustvo/32109/NATO-vojnici-nose-srpske-puske-.
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