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The 40 CTAS is a comprehensive modular weapon package which includes :


The key feature that characterises the Cased Telescoped technology and differentiates it from conventional medium calibre cannon is that the projectile is telescoped inside the cartridge case and surrounded by propellant. Compared to a conventional cartridge the overall round volume is reduced, especially the length.

The reduced length of the round allows rounds to be fed into the chamber along a line perpendicular to the barrel axis; the chamber is subsequently rotated through 90°, the round is fired, the chamber rotates a further 90° and the next round is introduced, displacing and ejecting the spent case of the last round.

This ‘push-through’ operation results in a very compact weapon design with low turret intrusion. The principal advantage, however, is that the axis of the introduction of the rounds is co-incident with the elevation axis of the weapon therefore allowing ammunition to be fed into the chamber along the same feed line regardless of the elevation angle of the gun. This results in the feed mechanism being completely static (with respect to the turret structure) and allows for more simple fire-on-the-move operations.

The feed mechanism is comprised of a carrousel-style Ammunition Handling System which provides quick and easy access to specific ammunition when required.

Capable of firing
at higher elevation,
giving more target flexibility.
Takes fewer rounds to do the same job.
Saves space inside the vehicle,
leaving more room for equipment and crew.
Can be retrofitted into existing vehicles,
providing a quick and efficient upgrade.

Copyright ©2022 BAE Systems


With its compact, versatile Cased Telescoped design, the 40 CTAS enables the agility and mobility needed for critical missions, without compromising on firepower. Thanks to its compact size, the system is easily adaptable to any type of turret, either land or naval, manned or unmanned. It is compatible with small race-ring diameters. The low turret intrusion enabled by the ‘push-through’ architecture allows extremely high elevation angles up to 75°.

The 40 CTAS achieves a 4km+ operational range while delivering unmatched armour penetration for a medium-calibre weapon. The terminal effect of the 40mm HE round is 4 times greater than that of a 30 mm conventional High Explosive round. The 40 CTAS ammunition can address land, naval and aerial targets including emerging drone threats.

The 40 CTAS has a rate of fire up to 200 rounds per minute and include a high accuracy mode compatible with coincidence firing system.

Entering in service

600 CT have been manufactured so far. The 40 CT/CTAS are being introduced into the armed forces of 3 NATO users.

CTAS are integrated on the following platforms:


Rapid fire


A weapon system tailored to your requirements

Following years of experience dealing with all types of integration challenges, we recognise the need to provide customised packages that guarantee you a complete system in a shorter timeframe.

We’ve structured our 40 CTAS offering into four configurations, from the simplest cannon module to our full system, including gun mount and ballistic software. Which fit is perfect for your requirements?