The vehicle has a soft self-sealing fuel tank that can absorb the impact of a projectile.

This model introduced self-sealing fuel tanks and powered gun turrets.

It had increased armor, self-sealing fuel tanks, and four machine guns.

Marine Corps version without self-sealing fuel tanks; 57 built.

This provided increased protection, self-sealing fuel tanks, and four machine guns; 584 were built.

However, the aircraft lacked self-sealing fuel tanks and pilot armor.

No armour was fitted, except for the self-sealing fuel tanks.

However, in reality it lacked sufficient armour protection and self-sealing fuel tanks.

Kelsey and the group of American airmen saw that self-sealing fuel tanks were critical in air combat.

Some of the most important additions were self-sealing fuel tanks and defensive armor.