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Old 02-06-2017, 05:09 PM   #1
Hilljack
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Default Hush Lil' Tigr

Have been wanting to run a suppressor on my Tigr. Have not seen much on suppressing these things. Thought it might work ok by venting the gas tube. Started out with an SVDS gas regulator. Drilled a hole forward of the standard vent position. Continued enlarging the new vent holes until the brass was only being thrown 10 or so yards. Yeah it's working. Tried it without the suppressor, and it would not cycle. Tried it with full gas and it still would not cycle. There is a step down in diameter on the forward part of the gas tube Too much gas was leaking by these holes. Bummer. Welded up the holes in the tube.

Plan B...
Like the standard SVD regulator, it has a 1 and 2 position setting. Made a mid / "1.5" setting in the regulator by filing a notch for the detente. Drilled holes in the mid position and again continued increasing the size. At 1/8" holes, the rifle was cycling well without beating itself to death. Brass was being thrown 10 or so yards. Without the suppressor, the rifle cycled fine on 1 or 2 settings. Yeah.

Thought the brass was flying a bit far. Opened the holes up to 9/64" not much difference. Opened the holes up to 5/32" and the brass was only going 5 - 6 yards. Will run this setting for a while.







Barrel was threaded and a SICO ARS flash hider installed. Running a Sico Omega suppressor with Anchor brake. It really tames the recoil and sounds like a .22 mag. Think it was a little quieter with the smaller vent holes. Could be mistaken on that, as I don't have a sound meter.

Special thanks to Boomer for helping with the pics...
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Old 02-06-2017, 05:16 PM   #2
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OMG ...... BECKY!!!!!
Thats sexy AF.
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Old 02-06-2017, 07:59 PM   #3
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sweet
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Old 02-06-2017, 08:36 PM   #4
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Thanks for sharing!
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Old 02-06-2017, 10:02 PM   #5
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Beauty!
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Old 02-06-2017, 10:15 PM   #6
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didn't think a tigr could possibly be any sexier...nice setup you got there
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Old 02-07-2017, 07:02 AM   #7
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Well done.

Looking for a cheap-ish Tiger right now to give it the VTB treatment and run an AAC SDN-6 on the front.
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Old 02-07-2017, 12:20 PM   #8
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Some day I will have a Tigr


Some day

Very nice Jack Im envious.
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Old 02-07-2017, 12:36 PM   #9
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Thanks guys. Hope this helps anyone wanting to suppress their SVD.
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Old 02-07-2017, 05:19 PM   #10
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I picked up a spare regulator to try something like this someday, though it's pretty far down on the list. Did you have any problems with the bore being concentric to the barrel?
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Old 02-07-2017, 06:41 PM   #11
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This is better than awesome. Nice work my friend. Have you chrono'd for velocity changes?
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Old 02-07-2017, 07:09 PM   #12
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Maxx, it was pretty close. There's not a lot of meat on these barrels.

Tried to get to the range before the winds came up. As usual the wind got there before me. Ran some ammo through it and had a few failures to eject. Guess the 5/32" is a little too much venting.

Shooting at 500 yards....

<iframe width="640" height="360" src="https://www.youtube.com/embed/kqD82IUxo1k?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/watch?featur...&v=kqD82IUxo1k

Around 400 rounds through the rifle at this point, 150ish suppressed, without cleaning. Dropped the regulator down to it's normal vent position, and it cycled with authority. So it looks like another weld/re-drill coming up.



Thanks Zen. No have not chrono'ed since the change. Good idea though.


Dunno what's up with the embed code.
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Old 02-10-2017, 12:41 PM   #13
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Welded one of the holes and drilled it 1/8"(other hole is 5/32") . Seems to run better. So, two 9/64" holes would probably work for my set up.

<iframe width="640" height="360" src="https://www.youtube.com/embed/wRDupV8zkns?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/watch?featur...&v=wRDupV8zkns

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Old 02-10-2017, 06:05 PM   #14
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Ejection looks pretty good. Have you looked at the back of the receiver and/or the carrier to see if they're beating each other up?
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Old 02-12-2017, 11:21 AM   #15
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Old 02-12-2017, 01:15 PM   #16
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Maxx, you are right, much more consistent ejection. The brass landed in a smaller pile than before. It's about the same as when it was stock.

Don't see anything on the back of the receiver, bolt carrier or recoil spring assy.



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Old 02-25-2017, 05:28 AM   #17
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this is awesome
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Old 04-22-2017, 04:27 PM   #18
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A little update.

Looking at the gas block, the hole in it is at a 45 degree angle. It can be threaded 8/32" kinda like a PSL(10/32") and a drilled set screw installed. Tried this with a new gas tube and piston. Could not get enough gas to cycle the rifle unsuppressed. Suppressed with 2x 1/16" holes, it ran fine.

Removed the set screw, unsuppressed it barely runs on normal vent. Full gas, it runs fine unsuppressed.

Suppressed with 2x 1/16" holes in the gas tube is is a little over gassed.

So the point to my ramblings is, suppressing an SVD this way may be very dependent on the parts you have. Start small with the holes in the gas tube. Also the gas tube is pretty hard. Used a carbide drill bit to get through it.

Will probably mix and match different pistons/gas tubes to see if it makes a difference.
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Old 04-22-2017, 04:47 PM   #19
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How far from the front of the gas tube are the vent holes? (Thinking that timing is as much a function as volume.)
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Old 04-22-2017, 04:53 PM   #20
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Same distance as the original vents, just different spots .
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