The base, unarmed model is a 6x6 wheeled form which provides a better turn radius (when compared to the 8x8 sister design) while retaining mobility and ground clearance. 8 x Smoke grenade dischargers are fitted in two banks of four launchers at the rear side hull roof lines. The ARMA 6x6 CBRN is another 6x6 wheeled form. This fits a 7.62mm trainable machine gun on a pintle mounting at the gunner's station offering light suppression capabilities. The ARMA 6x6 OMTTZA fits a 12.7mm Heavy Machine Gun (HMG) at the gunner's position (shield-protected) and carries 8 x Smoke grenade dischargers. The 12.7mm fit can be substituted with a 7.62mm caliber Medium Machine Gun (MMG) or a wholly-remotely-controlled Remote Weapon Station (RWS) fielding a 7.62mm machine gun. Over the rear of the hull can be installed a secondary, pintle-mounted 7.62mm weapon though little in the way of protection is afforded the firer.
8x8 wheeled models fulfill similar and more broadened battlefield roles: APC, IFV, mortar carrier, Mobile Gun Carrier, air defense/airspace denial, and CP.
ARMA 8x8 TZA mounts a powerful 20mm automatic cannon in a fully-traversing turret. A coaxial 7.62mm machine is fitted over the cannon and eight smoke grenade dischargers give the vehicle a self-screening capability. Advanced optics allow for excellent situational awareness by the crew. The ARMA "MIZRAK-30" fits an even more powerful 30mm autocannon with coaxial 7.62mm machine gun and smoke grenade dischargers. A tank-killing model has also been unveiled with a turret-mounted 105mm rifled main gun.
To date, the Otokar ARMA counts the military of Bahrain as an operator. The nation secured seventy-three vehicles in a 2010 deal. United Arab Emirates in 2017 announced a deal for 700 vehicles modified for army service under the "RABDAN" name. This truck weighs 28 tons when completed and outfitted.
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