Posts tagged “Suppressor

Interesting Firearms: DeLisle Silent Carbine

I got to handle and photograph a DeLisle Silent Carbine today. Unfortunately not the original, but the next best thing: A Valkyrie Arms replica.

A brief history of the DeLisle Silent Carbine.
In 1943, Mr William Godfrey DeLisle submitted his .45 ACP DeLisle Carbine prototype to Sir Malcolm Campbell of the Combined Operations HQ for unofficial testing. The testing was done at the Atlantic Seashore, and the gun was noted to have no muzzleflash, even at low light and was “inaudible” at 50 yards. Grouping of 2″ at 50 yards was reported.
DeLisle was ordered to produce an additional small number of carbines, and with the assistance of a few machinists, out of rejected SMLE rifles and Thompson Submachinegun barrels, 17 additional carbines were produced.
These 17 guns were directly put into the hands of British Commando units.
On January 12th of 1944, Mr DeLisle was informed that the “trials to date had been promising”, and by August of 1944, Sterling Engineering Company started production of the carbine, with few exterior modifications. About 130 units were made by Sterling, of which 106 being delivered to Combined Operations.
In the meantime, the 17 prototypes had been used extensively in France by British Commandos, on hit and run missions, all while the ordnance board was still reviewing the design and testing.

The gun pictured is a Valkyrie Arms replica. Valkyrie built the gun true to the original blue-prints, including the design of the suppressor.

SMLE No#1 Action

Large Volume Suppressor. The Design of the suppressor was a basic Maxim design, consisting of 2 expansion chambers and a simple yet effective spiral diffusion system.

The rifle is fed from a standard 7 round 1911 magazine.

The bore is off-center, to minimize disturbance of the gasses, making the suppressor more effective.

The Valkryie Arms replica is a beautifully built rifle, and not often encountered. Definitely a rare and desirable piece, even for a replica!

I hope to be able to shoot the rifle at my next visit.


10/22 Bolt Noise.

Sometimes, when shooting my 10/22 suppressed, I reach over with my left arm, and with my thumb, I jam the bolt forward, stopping the gun from cycling after each shot. I find it to be quieter to the shooter. It really allows you to hear how the silencer performs.

Even with a Polyurethane Buffer, the action is still relatively loud.

On a certain website, owned by a guy that researches silencers, the JG Bolt Lock device was tested. The device worked as advertised, and a noise reduction of less than 1.5dB was measured using standard velocity CCI. I would love to post a link, but the site’s owner not only charges folks to read his reviews, his Terms of Use are pretty out there. I won’t risk getting sued.

So I thought I’d build my own. If anything, just to save my thumb.

I had some black plastic material around, commonly used for gun-stands etc. I took a strip of the material, and after carefully setting up my precision milling machine, I cut a rough prototype.

A Dremel cutting bit at over 2000 RPM cut the material just fine.