The BT-7, or ‘Betka’ as it is called by its crew, is a lightly armored Soviet cavalry tank. It is well armed with a 45mm cannon and a 7.62mm machine gun. It is also the predecessor to the famous T-34.
― Heroes & Generals
BT-7 has a lot of weakspots that are spread across the entire tank, relatively low hitpoint, and very weak armor. It will not survive for long under fire.
BT-7 has a standard 45mm main gun. Although it is inferior to T-70's 45mm gun, it is nonetheless sufficient enough to effectively dish out damage to both infantry and vehicles alike, given proper ammunition is used.
The BT-7 has an excellent top speed, acceleration, and reverse speed. Successful use of this tank is almost always dependent on fully harnessing its speed aspect.
BT-7's weak armor extends to its turret as well: it has a fragile cannon breech which is prone to being destroyed . Stay on the move and avoid close quarters engagements to minimize the chance of breech destruction, as it mutually assures the destruction of the tank.