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custom suppressor for small calibres

A place to ask general spud cannon related questions.
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Unread postAuthor: VH_man » Sun Nov 11, 2007 9:30 pm

Even junky little pump airguns make a nice CRACK when they fire. we make things that go WHOOOBAMMMWHOOOSHHH

basically, the spudgun will never be a silent beast........ we can try........... yay efficiency!!!
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 12, 2007 12:13 am

Indeed, a truly quiet pneumatic would have a very long barrel and large suppressor volume, as well as a low chamber:barrel volume ratio - a bit like the Hastings metro gun system.
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Unread postAuthor: POLAND_SPUD » Mon Nov 12, 2007 12:41 am

Yeah but you can still build a spudgun with, let say, 120 cm barrel that has threaded muzzle and/or small holes drilled on last 15 cm of the barrel; adjustable chamber
(with a ball valve between the two sections
40 cm -------- a BV --------- 60 cm )

You have a 'regular' spudgun, but when you want to make it silent you just close the valve and add a silencer.
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Unread postAuthor: Eddbot » Mon Nov 12, 2007 1:46 am

that's pretty cool, how close does it get to the silenced shot effect you hear in movies?
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Unread postAuthor: hi » Mon Nov 12, 2007 1:49 am

Eddbot wrote:that's pretty cool, how close does it get to the silenced shot effect you hear in movies?


i could be wrong, but i think the sound you hear in the movies is mostly the bolt rather than the boom.

its a nice supressor by the way
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 12, 2007 2:06 am

Eddbot wrote:that's pretty cool, how close does it get to the silenced shot effect you hear in movies?


The muzzle crack is practically eliminated but there's still the noise of the hammer slamming into the valve and subsequent spring twang. This is inevitable with high powered air rifles, although the Career in question is adjustable and at around 15 ft/lbs is much more silent.

i could be wrong, but i think the sound you hear in the movies is mostly the bolt rather than the boom.


When firing subsonic ammunition such as the 22LR or 45ACP as shown here, the muzzle noise is almost entirely eliminated and the only noise you can hear is the "click" of the firing pin and noise of the mechanism cycling. A suppressed bolt action rifle firing subsonic ammunition has even less mechanical noise.
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Unread postAuthor: POLAND_SPUD » Mon Nov 12, 2007 2:18 am

what about the sound of flying projectiles ? has anyone else encountered that ?
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 12, 2007 2:22 am

POLAND_SPUD wrote:what about the sound of flying projectiles?


If your projectile is subsonic then that shouldn't be an issue. The only way I get projectile noise is from richochets off a hard target, and of course the noise of the projectile hitting the target itself.
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Unread postAuthor: ALIHISGREAT » Mon Nov 12, 2007 2:45 am

wow that is one nice silencer design, you should post a vid with silencer on and off so we can see how effective it is.
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Unread postAuthor: spudgunnerwryyyyy » Mon Nov 12, 2007 2:53 am

Consmer cams are usually ineffective and recording sublte changes in sound but it may be worth a shot.
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 12, 2007 3:25 am

I currently lack a camera that records sound but I'll see if my client will make one for me. Some time in the next two weeks though as I'm still waiting for the threaded adapter from the machine shop.
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Unread postAuthor: Mr.Russ » Mon Nov 12, 2007 5:14 am

im probably going to make one similar to this, case it in 1" pipe.. i dont have washers and im too tight to buy them so would it be possible for me to use another disc of metal(20c piece:D about .5mm off the ID of 1") this might be tricky though because ive got to line the holes up and im not that mich of a good driller, although i could use a centre punch.

anyone know an easy way to find the centre of a coin?
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 12, 2007 5:40 am

Use that coin to buy a washer :p
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Unread postAuthor: Mr.Russ » Mon Nov 12, 2007 5:45 am

lol! thats a good idea but ill have to have a look at the hardware store.. not to sure on there range of washers

most of the washers have a 6 or 7mm dia hole in them already.. i would just have to make it a little bit bigger.
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Unread postAuthor: VH_man » Mon Nov 12, 2007 11:02 am

my dad has a funky hunk of metal that is used for finding the centers of dowels. im not sure how much it cost (im pretty sure ALOT) but it has worked perfectly for centering things on our lathe........
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