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Posted: 5/10/2016 2:52:19 PM EDT
[Last Edit: 5/10/2016 2:59:41 PM EDT by bradpierson26]
I'm trying to determine what 3 lug module to use with a Thompson Machine SG-2
I believe the thread pitch is 1 3/16x24. I know the Gemtech multimount 3 lug works and I don't think the Rugged Obsidian 3 lug will work.

What's the pitch on the Griffin one? I know the SiCO module is huge, no interest
Does anyone else have a 3 lug module worth considering?
Link Posted: 5/10/2016 5:40:47 PM EDT
Gemtech Multimount and Liberty.

Silencerco / Rugged / Griffin won't.

Posted Via AR15.Com Mobile
Link Posted: 5/10/2016 5:47:17 PM EDT
Originally Posted By bradpierson26:
I'm trying to determine what 3 lug module to use with a Thompson Machine SG-2
I believe the thread pitch is 1 3/16x24. I know the Gemtech multimount 3 lug works and I don't think the Rugged Obsidian 3 lug will work.

What's the pitch on the Griffin one? I know the SiCO module is huge, no interest
Does anyone else have a 3 lug module worth considering?
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Don't know thread pitch, but Griffin is larger than GemTech.
Link Posted: 5/10/2016 7:29:29 PM EDT
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Originally Posted By RenegadeX:


Don't know thread pitch, but Griffin is larger than GemTech.
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Originally Posted By RenegadeX:
Originally Posted By bradpierson26:
I'm trying to determine what 3 lug module to use with a Thompson Machine SG-2
I believe the thread pitch is 1 3/16x24. I know the Gemtech multimount 3 lug works and I don't think the Rugged Obsidian 3 lug will work.

What's the pitch on the Griffin one? I know the SiCO module is huge, no interest
Does anyone else have a 3 lug module worth considering?


Don't know thread pitch, but Griffin is larger than GemTech.


The thread pitch is 1-1/8x28.
Chris Brady | Marketing Director
Rugged Suppressors
Link Posted: 5/10/2016 7:48:00 PM EDT
[Last Edit: 5/10/2016 7:50:02 PM EDT by Green0]
Link Posted: 5/10/2016 9:13:37 PM EDT
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Originally Posted By Green0:
Our piston retainer and 3 lug use the 1.125x28 thread.  Our unique 3 lug coupler design appears to be the design Rugged is planning to use- with a cosmetic modification.  

I'm not really a fan of the legacy systems- they have light springs and depend on several diameters to fit and not cause baffle strikes.  My only experience with the legacy 3-lug systems was with the first generation SWR Trident 9, and my observation was that they cause poor accuracy and the cans rattle around on the mounts.  No baffle strikes, but obviously poor alignment was occurring.  The wobble on a Tros barrel was visually apparent to the naked eye during firing of the silencer on a 9mm carbine and groups went front 2" @ 50 yards to vertically strung ovals ~10-13" in size.
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Would you consider that gemtech and Liberty systems legacy? I have a gemtech 3 lug adaptor with a low round count on it that fits my tros barrel very well. It is on a form 1 can and I don't get any POI shift or change in group size. I would have loved to use one of your systems on my can ( your stuff seems well engineered and durable ) but I was too lazy to reverse engineer it into my tube.
Link Posted: 5/10/2016 10:47:08 PM EDT
I have a Liberty 3LUG Adapter on my TM SG-2, both are awesome.

Link Posted: 5/10/2016 10:59:16 PM EDT
Link Posted: 5/10/2016 11:02:48 PM EDT
Here's the Gemtech 3-lug adapter next to the UZI mount that my SG-2 shipped with:












Link Posted: 5/11/2016 5:31:24 AM EDT
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Thanks for the pics
That Gemtech 3 lug isn't small
Link Posted: 5/11/2016 8:59:17 AM EDT
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Originally Posted By Kristofer_G:
I have a Liberty 3LUG Adapter on my TM SG-2, both are awesome.

https://jggunsmith.files.wordpress.com/2016/04/mpa30dmg_swfa10x.jpg
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Don't want to derail everything, but WTF haha. Please explain this.
Link Posted: 5/11/2016 11:49:40 AM EDT
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Originally Posted By carterbrunelle:


Don't want to derail everything, but WTF haha. Please explain this.
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Originally Posted By carterbrunelle:
Originally Posted By Kristofer_G:
I have a Liberty 3LUG Adapter on my TM SG-2, both are awesome.

https://jggunsmith.files.wordpress.com/2016/04/mpa30dmg_swfa10x.jpg


Don't want to derail everything, but WTF haha. Please explain this.


Would like to know too.

Maybe for the occasional 600 yard 9mm match?

But, build whatever makes you happy. I do.
Link Posted: 5/11/2016 5:12:31 PM EDT
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Originally Posted By carterbrunelle:


Don't want to derail everything, but WTF haha. Please explain this.
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Originally Posted By carterbrunelle:
Originally Posted By Kristofer_G:
I have a Liberty 3LUG Adapter on my TM SG-2, both are awesome.

https://jggunsmith.files.wordpress.com/2016/04/mpa30dmg_swfa10x.jpg


Don't want to derail everything, but WTF haha. Please explain this.

You don't run 10x on your SBR?

I was trying it out at 100 yards to see what I could ring from it accuracy wise.

Which was about 7 moa for ten shot groups.

My 30DMG's every day sight is a Leupold Prismatic 1x.

Link Posted: 5/11/2016 5:35:37 PM EDT
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Originally Posted By Green0:
Our piston retainer and 3 lug use the 1.125x28 thread.  Our unique 3 lug coupler design appears to be the design Rugged is planning to use- with a cosmetic modification.  

I'm not really a fan of the legacy systems- they have light springs and depend on several diameters to fit and not cause baffle strikes.
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Great information, can you go into anymore detail about "legacy systems"? What makes yours different or what brands do you consider "legacy"? Your 3-lug seems clever and I've been toying with the idea of going 3-lug for my pistol caliber rifles.
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