9mm 3 Lug Barrel Adapters

Now: $79.95
(You save )
(35 reviews) Write a Review

These 3 Lug adapters are HK pattern and will work with any 3 lug silencer on the market made to this standard. They will also work with Griffin 3 lug interface assemblies

The 5/8x24 and 13.5x1mm LH versions have a cylindrical machined extension added to the mount. The 13.5mm version has flats for a wrench on that cylinder extension and has the O-ring interface typical of 13.5x1 LH mounts. The other 3 Lugs are the smaller version pictured.

The 5/8x24 is meant to provide a 3 Lug mount to 30 caliber barrels but is also compatible to 9mm barrels where that thread is uncommonly used. Most 30 caliber barrels are threaded 5/8x24 thread pitch.

1/2x28 Thread Total Length: 1.4375". Based off of industry standard .625" barrel threads, added length should be ~.8125".
5/8x24 Thread Total Length: 2.125". Based off of industry standard .625" barrel threads, added length should be ~1.5".

Made from 17-4ph stainless and Melonite QPQ treated.

Thread Pitch:
Thread Pitch:
Thread Pitch:
Thread Pitch:
13.5x1mm LH
Attachment System:
3 Lug
Type Of Part:
3 Lug

35 Reviews

  • 4

    Published by John on 6th Mar 2024

    Product works as advertised.

  • 5

    Published by Unknown on 11th Jan 2023

    fit perfect on my mpx k can't wait till my Bushwacker gets out of jail

  • 5
    9mm 3 Lug Barrel Adapter

    Published by Craig on 6th Dec 2022

    Excellent quality product from Griffin! Machining and finish on these lugs is top notch.

  • 5
    Sig MPX tri-lug adapter

    Published by Kirk on 18th Oct 2022

    This item was amazing quality and works perfectly.

  • 5
    Great Product

    Published by C.Fain on 23rd Aug 2022

    I bought to mount on two of my PCC's to use with my Rex MG7 suppressor, I am very happy with how they easily they mounted and how they lock up tight with the suppressor.

  • 5
    3 lug adapter

    Published by Unknown on 28th Feb 2022

    I own 4 of these. Each one is excellent

  • 5
    A product that always works

    Published by Denis A Crowns on 31st Jan 2022

    This adapter works as advertised. I use it with the Griffin Armament Rev-9 suppresser on my 300 blackout pistols with 10.5 and shorter barrels. Fairly priced, fast shipping If you need it, buy it.

  • 5
    fit properly

    Published by Gary Carr on 18th Jan 2022

    needs no changes

  • 4
    three lugs, no slugs

    Published by John Weiss III on 7th Dec 2021

    Well. it's official. My SIG MPX now has some of the coolness of an MP5 thanks to this 3 lug mount. Even with that weird 13.5mm left hand thread, this mount went right on, and the included o-ring was a nice touch, but Griffin Armament is run by shooters who engineer, and it shows in their quality and ease of use. Mine is securing an older AAC Ti-rant 45 thanks to an adapter. But of course you could just get a Griffin can, and avoid the guess work

  • 5

    Published by alexey stebunov on 28th Sep 2021

    I was impressed.Superb quality and attention to detail.Fit my MPX like a glove.Thank you