The T17E1 was armed with a 37 mm M6 gun, a coaxial .30 cal Browning 1919A4 machine gun and a 2-inch smoke mortar in a rotating turret. In the hull was mounted a .30 cal Browning 1919A4 machine gun. Some T17E1 had an additional .30 Browning 1919A4 cal machine gun for anti-aircraft defense.
