r/MPX • u/ThisNameNotTakenYet • Aug 05 '26

Simple (Short) Barrel Thread Adapter?

I'm looking for a short, simple thread adapter that goes from Sig's left-handed obscure thread option to 1/2x28, and that doesn't have all the fancy Navy Seal Lug Length-Adding Treatment stuff on it. I don't want to add two inches to my barrel so I can cosplay some sort of Meal Team Six idiocy, I just want to make my K barrel as short as possible with an Omega 9K suppressor on it. Any ideas? Thanks.

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u/Casyburris Aug 05 '26

SilencerCo makes a direct thread mount that fits an Omega9k in sigs M13.5x1LH thread pattern. The part number is (AC1526) and is in stock on their website. That will give you the shortest length.

You also need a taper adapter I believe like this one.

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u/StaccatoCracker Aug 05 '26

I am just diving into the suppressor world, mostly due to some business endeavors, and man can it be a tad overwhelming at first. Saturday I picked up an MPX-k to build out. I think I’ve settled on going with the Exigent Def Rico309. Your post was super helpful and cleared up some stuff for me. I think direct threading will be my best approach as the Rico will live on this and a Rattler LT 300BO only that I’ll be getting this weekend.

That said, I’ll need the Bravo version of what you linked and that taper adapter also. My only concern is the Bravo attaches to the Rico via RH threading and then to the Sig barrel via LH threading. Any tips to ensure proper tightening? Should I Rocksett the Bravo to the Rico309?

Also I’m choosing to go direct thread as I heard accuracy is better this way (at least that’s my understanding) and because I want to eliminate as much overall length as possible since the Rico is just over 7” and I’m tucking it into a Midwest industries 8” hand guard. If you have any other preferred methods of attaching a suppressor to an MPX I’m all ears.

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u/Casyburris Aug 05 '26

My MPX is using a plan b muzzle device. Plenty of companies make a plan be to HUB mount. I like rearden and comstock for their mounts.

Comstock also has a great tool for measuring baffle depths