SIGforum
Newbie question... suppressor 3-lug booster mount?

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/380105858/m/1440044125

July 17, 2026, 10:20 PM
911Boss
Newbie question... suppressor 3-lug booster mount?
I put this in my other thread, but thought I would do another post to increase exposure.


Possible to use 3-lug mounting with a booster or are boosters only compatible with specific threaded pistons? Any such thing as a 3-lug piston?






What part of "...Shall not be infringed" don't you understand???


July 17, 2026, 10:49 PM
hrcjon
as both Dwill104 and I said in the other thread neither of us have heard of such a thing. But in the universe its always possible, but I don't for the life of me see how one could design such a thing, you need a spring for the 3 lug to be tensioned and then inside that you need the neilsen to have a spring and be free to move.
And to cut to the chase you don't want to hang a 3 lug muzzle device on a 226 anyway. There are a couple of ways to get a qd that has a booster but really none of them make any sense on a pistol.


“So in war, the way is to avoid what is strong, and strike at what is weak.”
July 18, 2026, 12:30 AM
P220 Smudge
The short answer is no. Get a tri lug mount, get a booster mount, get a wrench for those mounts, and swap them out as needed.

There are things like the Griffin EZ Lok ecosystem and fixed spacers, but that’s getting into a can of worms, and given that you’re dealing with Sigs and that reverse thread 13x1 stuff, I just don’t know.


______________________________________________
"If the truth shall kill them, let them die.”

Endeavoring to master the subtle art of the grapefruit spoon.
July 18, 2026, 09:15 AM
SIGfourme
Terminology needs to be identified.
Rifles will have a fixed, threaded barrel. Mounts for rifles are direct thread or QD. Tri lug is a variant of QD.
Pistols that use a Browning type action require a piston and spring. These are pistons in right or left hand thread.
22 rimfire have fixed barrels for pistols--the slides move. Therefore direct thread .
Can you convert rifle threads? Yes , a thread adaptor is required.
The standard mounting thread at the base of a rifle suppressor is
1) HUB or 1.375 Bravo. AKA Omega, ASR, YHM,
2) Alpha 1.125-28 = SilencerCo
3) 1.18-24 = Liberty
4) 1 7/16-20 = D cell
You have to understand thread pitch. Thread pitch determines what mates to your barrel.
July 18, 2026, 07:25 PM
hrcjon
This post confuses me and I'm definately not a newbie.
There are definately rifle barrels without threads like many which might just have a 3lug. But the OP is clearly asking about pistols since he asked about a booster which would almost never be about any rifle that I can think of.
Browning pistols need not only a piston and a spring they need the housing that matches the thread pattern of the suppressor to house them all with a compatable configuration of spring and piston and sometimes they don't mix and match mfg.
All FWIW to the OP who I think has his answer in the other post.


“So in war, the way is to avoid what is strong, and strike at what is weak.”
July 18, 2026, 07:50 PM
Dwill104
If the purpose is to not have to swap adapters or a spring for a fixed barrel spacer, there are some small very lightweight 9mm direct thread cans like the SAW Shiv that claim to not need a booster. You could, in theory, run a can like that using direct thread on both your Sig P226 and MPX, assuming the barrel thread pitch is compatible with the suppressor thread pitch. I believe the Shiv only comes in 1/2x28, but there might be other cans that come in M13.5x1 LH.

Of course, a can lightweight enough not to require a booster is going to give up some sound performance.
July 18, 2026, 08:28 PM
911Boss
Sorry for any confusion…



I understand the various thread/pitch issue. Realize no booster needed for MPX and do need booster for P226. No issue taking booster on and off the can.

I just liked the idea of a quick attach/detach option of the 3-lug vs. screwing it on and off.


Pretty much figured it wasn’t an option with a booster, just thought I would ask.






What part of "...Shall not be infringed" don't you understand???


July 19, 2026, 10:18 AM
Vgex
Just to combine it. For a P226 to have QD there are essentially three options. Silencerco's proprietary system for their vaporware S98, and Griffin Armament's two options. EZ-Lok and Cam-Lok.

Silencerco' S98 is specific to 9mm handguns and no M13.5 thread adapter for the S98 mount is available. If you swapped the standard MPX-K barrel for one threaded in 1/2x28, you might be in business, as the S98 is boosterless. That being said, I don't even see 1/2x28 S98 mounts on their site, hence the vaporware comment.

Other's mentioned Griffin's Cam-Lok and EZ-Lok both have a plethora of thread pitches, however, if you are taking the booster out to replace the piston spring with a fixed barrel spacer anyway, you lose the true QD you're looking for.

Manufacturers just need to start selling integrally suppressed pistols from the factory, like the Maxim 9, except reliable and under $1k.
July 19, 2026, 05:45 PM
P220 Smudge
quote:
Originally posted by 911Boss:
Pretty much figured it wasn’t an option with a booster, just thought I would ask.


The big problem with any of the options that do kind of what you're getting at is you're adding shit to a threaded pistol barrel that has to come off if you want to disassemble your pistol beyond separating the slide from the frame. Leaving this crap on my gun is why I decided to pass on the Griffin EZ Lok a friend loaned me to try out.



A thread protector, some O rings, and plumber's tape makes it all much cleaner and more manageable, imo.

Griffin makes a tri-lug system, but do you really want this hanging off your 226 when you're not shooting with the can mounted? I don't.



And again, you'd need to install the fixed barrel spacer to the mount in the can anyways when you're swapping it over to your MPX, so you're not really saving yourself any hassle. The only real benefit to this stuff is being able to mount a can on the pistol very quickly, which... I just don't see the point of. I just leave the thing on there unless I need to transport it in a case that won't allow a pistol with a can mounted. Tri lug on little subguns is nice for that exact reason, and the ways people typically employ them. Even then, I've gone to Plan B stuff on my Stribog.


______________________________________________
"If the truth shall kill them, let them die.”

Endeavoring to master the subtle art of the grapefruit spoon.
July 19, 2026, 07:57 PM
hrcjon
I tried ezelok on a LWRC .45 because it really is the only way to get a qd with a booster. and the design of the LWRC unlike just about any SMG made needs a booster. All I can say that its not very good, and would not recommend it for any application really.


“So in war, the way is to avoid what is strong, and strike at what is weak.”
July 19, 2026, 08:54 PM
Dwill104
quote:
Originally posted by hrcjon:
I tried ezelok on a LWRC .45 because it really is the only way to get a qd with a booster. and the design of the LWRC unlike just about any SMG made needs a booster. All I can say that its not very good, and would not recommend it for any application really.


I had a similar experience with ez-lok on my SMG-45! I ran it with an Obsidian 45 using the normal Rugged piston without issue. I bought the ez-lok comp and piston for what I hoped would be a more positive retention, but when I tried it, the can started loosening after only one mag. My feeling was that it stayed on better with the original piston and threaded barrel.

I don’t know if it’s a problem with the system in general, or whether it’s something specific about the SMG-45, because the barrel doesn’t tilt, it slides horizontally. I only ever tried it on the SMG-45, because I don’t like having muzzle devices on pistols that prevent removing the barrel for maintenance.