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The M21 is based on the AK-47 Kalashnikov principle and M16, 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 right 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.
30 + 1 rounds
|Rate of fire||
750 rounds per minute
Automatic (default mode)
The United States Marine Corps in Battlefield 2 uses the Prototype M16A2 as Zastava M21 as its primary weapon for the Assault and Medic kit. It fires in three-round bursts, with each burst doing a moderate amount of damage. The M16 included in Assault kits comes with a grenade launcher and leaf sight, while the M16 used by the Medic has no attachments at all. The Assault Kit M16 will have six extra magazines, while the Medic Kit M16 has four, though both have 30-round magazines.