The main gun also had a bore evacuator to eliminate fumes and an integral fire control system.

The gun barrel is fitted with a bore evacuator and has a thermal sleeve.

The barrel of the L7 is fitted with a bore evacuator approximately halfway down its length.

M3A1 gun with bore evacuator and single-baffle muzzle brake.

Uses a round breech with a vertically-sliding breechblock, and a different design of bore evacuator.

Additionally, the turret bustle had a different shape and the bore evacuator had a different position.

The gun is insulated with a thermal sleeve and has an automatic compressed air fume extraction system instead of the usual bore evacuator.

They often show a bulge in the barrel, which is a bore evacuator, or a device on the muzzle, which is a muzzle brake.

The PT-76 is typically fitted with the D-56T gun with double-baffle muzzle brake and a bore evacuator towards the muzzle.

When the rebuild began in November, 1949, the upgraded M26 received a new power plant and a main gun with bore evacuator, and the M46 Patton designation.

The smoothbore gun is the same length as the L30A1, and is fitted with the rifled gun's cradle, thermal sleeve, bore evacuator and muzzle reference system.

M48A2C: M48A2s with an improved rangefinder, M17, new ballistic drive and bore evacuator for the main gun, and the auxiliary tensioning wheels were deleted.

The bore evacuator and the gun's thermal sleeve of the A4 and A5, designed to regulate the temperature of the barrel, are fabricated out of glass-reinforced plastic.

A bore evacuator is a device on the gun barrel of an armoured fighting vehicle which helps prevent poisonous propellant gases from venting back into the vehicle's fighting compartment when the gun breech is opened to load another round.