British De Lisle Commando Carbine with integrated suppressor

British De Lisle Commando Carbine with integrated suppressor


Technical data

Type Bolt carbine
Model De Lisle Commando Carbine
Made by Ford Dagenham Company
Used by SAS and British commandos during WWII and the following years
Date 1943
Dimensions 93.5 cm (L)
Weight 3.760 kg
Where to be found within the War Heritage Institute Royal Military Museum, storage

A need for Second World War secret missions weapons

The WHI collections count several extremely rare historical firearms and the De Lisle carbine is one of them. Right from the start of the Second World War the British armed forces deploy a number of specialised commando units behind enemy lines. Consequently, they need weapons suitable for use during such covert missions. In 1943 Sir Malcolm Campbell of the Special Operations Executive therefore commissions a British Air Force engineer, William G. De Lisle, to design a prototype. This is developed at the Ford Motors factory in Dagenham.

The idea is to build the most silent weapon possible for use during missions in enemy territory/behind the lines and it is created by combining and adapting parts of three famous firearms. It is one of the “quietest” military firearms in history.



The weapon consists of the butt and bolt action of a Lee Enfield MK III rifle (modified to enable the use of the .45 ACP pistol cartridge), a magazine taken from the 1911 Colt pistol (capacity 7 cartridges) and the barrel of the Thompson machine gun fitted with a huge silencer. This silencer or suppressor is one of the item’s most distinctive features and accounts for more than half of the weapon’s total length.

Although prototypes of this weapon exist in a .22 calibre, the .45 ACP soon proves to be the most suitable calibre. The heavy projectile, in combination with a fairly reduced powder load, makes for an inherently subsonic calibre. The bullet can therefore never break through the sound barrier, and thus avoids the inevitable loud bang. The cartridge is nevertheless powerful enough to effectively eliminate enemies at short range (between 50 and 100 m).

However, the noise produced by the release of the gasses as the bullet leaves the barrel also needs to be taken into account. The answer comes in the shape of a large silencer of 5.1 cm in diameter. Combined with a very short barrel of a mere 17.5 cm, this  suppressor ensures that the gases released by the shot are already greatly reduced in force when they reach the front of the silencer. Several holes are also drilled in the end of the barrel to keep gas pressure as low as possible when the bullet is released.

As this silencer heats up after only a few shots, a wooden guard is placed underneath. The principle of the Lee Enfield bolt action is deliberately maintained. Experience with other silenced weapons deployed in similar missions, such as the Sten MKII(S), shows that the sound of the automatic loading principle is disturbing when only one shot is fired. Bolt action completely eliminates the noise after the shot, unless the shooter decides to reload manually. As operating in silence and secrecy is of the utmost importance, the steel underside of the bolt handle is even fitted with a piece of rubber, so as to muffle the striking of the handle against the butt-socket.


Did you know that…

  • these weapons, despite very small production numbers, were well and truly used during covert operations in northern France during the Second World War? They were also utilized in the Far East against the Japanese army, specifically for taking out guards.

  • the British government distributed obsolete De Lisle carbines to British farmers in Malaysia in the 1950s, to defend their lands against banditry?

  • many anecdotes about this weapon circulate, some more credible than others? For instance, it was allegedly tested in London by firing it from a rooftop, targeting the Thames. The reaction of unsuspecting passers-by was monitored and apparently no one realised that a firearm had just been fired.

What makes the De Lisle Commando Carbine a top piece?

It is a weapon of legendary, almost mythical status, of which only some 130 were produced. This object is extra special because it is one of 17 or 18 test prototypes delivered by the Ford Dagenham Company in London. Six of these ended up in Belgium, and this specimen is one of those.

-Arthur Van Rossem, collection manager Portable Firearms, War Heritage Institute