The T-15 BMP is fitted with an unmanned turret located at the rear of the vehicle, designed and manufactured by the Defense Company KBP. According to Russian military experts, the turret is equipped with one 30mm 2A42 automatic cannon as the main armament. The 2A42 cannon is highly reliable due to single-barrel gas-operated action which has a maximum range of 4,000m. The fixed receiver facilitates the ammunition belts feeding into the gun. The ammunition load is consumed efficiently due to selective feeding and firing rate alteration capabilities implemented in the gun. The long barrel contributes to extend point-blank firing range. The T-15 Armata carries a total of 500 ammunition including 160 armor-piercing and 340 high-explosive fragmentation rounds. The second armament of the vehicle includes a PKTM 7,62mm machine gun and two anti-tank guided missile Kornet-D launchers mounted on each side of the turret. The Kornet-D uses technical vision with an automatic target tracker to make it a "fire and forget" missile, giving it a 5-times increase in accuracy of target tracking at any range. It can engage targets from a range of 150 to 10,000m. The fire and forget capability gives a vehicle the ability to salvo launch against two different targets at once, increasing its rate of fire and decreasing the number of vehicles needed for a mission. It can also salvo fire two missiles against one target to defeat vehicles equipped with an active protection system Turret traverse and weapon elevation are all-electric with manual controls provided for emergency use. The turret weapon station is fully autonomous with ammunition located inside the turret and thus fully isolated from the crew compartment.

The T-15 BMP Armata used a new design if you compare the old generation of Russian AIFV (Armoured Infantry Fighting Vehicle) as the BMP family. At the front of the hull is located the crew of the vehicle with the commander, gunner, driver, and the troop's compartment at the rear which can carry a total of 9 soldiers. The armor consists of some places of a layer of concrete sandwiched between layers of steel, ceramic and composite materials, which offers a high level of protection against the firing of small arms and the blast of mine explosions. The front of the vehicle is protected by add-on armor to provide protection not only from the firing of small arms and shell splinters but also against the most modern tank ammunition and anti-tank guided missiles. The top of the vehicle seems to be protected by integrated ERA (Explosive Reactive Armour). The rear side of the hull is equipped with a power-operated ramp that opens downwards that offers the troops to leave and enter quickly of the vehicle. The protection of this ramp is enhanced by the use of slat armor.