Posts tagged “silencer

What’s in your silencer?

One of my employees purchased a nifty little Snap-On Borescope, with a tiny lighted head the other day. Of course I commandeered it immediately for scientific purposes…

Let’s take a look at my old Gemtech M4-02. Purchased little over 7 years ago, it’s seen thousands and thousands of rounds. Most on 11.5″ guns. Some FA, but not a lot. A good amount of .22 as well. Plated and lead. Overall, a good amount of abuse.
I’ve recently started noticing that it just wouldn’t suppress as well as other .223 cans, so I became suspicious.

Now – the pics below are taken off my TV screen, I plan to buy a proper adapter to get the images digitally into my computer. Until then, this will have to do.

Let’s start from the blast baffle:
Blast baffle

Nothing much to see, lots of carbon buildup.

 

Second baffle.

IMG_5895A bit jagged, rough edges, but still relatively round.

Moving on, the third baffle.

IMG_5896

 

IMG_5897

 

 

 

 

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Far from round, an unbelievable amount of material built up around the edges. Interestingly enough, it’s all facing the muzzle. That leads me to believe we’re looking at jackets, or lead, piled up on top of each other along with a healthy bit of erosion.

 

And finally, the end cap.

IMG_5898

 

IMG_5899

The end cap has what I would describe as “the rolling hills of lead” built up around it. Seems very tick, some spots a bit blue in tint, and very smooth, compared to the jagged mess we saw earlier.

Dr. Dater from Gemtech has informed me that they may be able to rebuild my can, which I am eager to have done.

After talking with Stalking Rhino about rebuilding it or even converting it to a dedicated .22 can, I’ve decided to hold off, as the work, which will undoubtedly be top notch, is inherently cost prohibitive compared to the purchase price of the original can. But that’s part of the game.

 


More of the K98-45 Mauser.

I was able to take the gun out today, and shoot it without other shooters around. She functioned flawlessly, the cheap gunshow magazine marked “COLT 45” works even better than the Chip McCormick one. I had ZERO feeding issues today.


I soldered on a rear sight sleeve, and a front sight. The finish I ended up applying was Brownell’s Park-grey. I had two out-of the box failures with the pricey gun-kote they sell. Truly a crappy product.

Next week I hope to properly sight it in.


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.


Gemtech Outback Upgrade.

Kel from Gemtech recently pointed out that they now have the “Gemtech – Have it your way” upgrade program for the Outback and Outback II line of .22lr silencers.

I’ve decided to send mine in, as it is very old, and not user serviceable. It also doesn’t quite compete with the modern cans anymore, a recently purchased YHM Mite was quieter than the Outback.

The options Gemtech offers in the “Have it your way” means that the owner has a choice in materials for the blast baffle, and the following 5 K-Baffles. The choices are Aluminum, Stainless Steel and Titanium. I chose for a Titanium blast baffle, as it takes the brunt of the blast and crap, and aluminum baffles for the remaining 5 K’s.
Stainless steel is a nice option as well, as it is easy to clean, but it is also heavier. And that is less desirable with a .22 silencer this size.
The Outback weighs in at 4.3 Oz. at the time of shipping. It would be interesting to see the weight change when I receive it back.
I think my choice is a good one. The can will go out in tomorrow’s UPS. Look for an update once it comes back!

My Outback right before sending it in to get upgraded.


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.

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