PLAN-A™, Taper Mount Adapter for OMEGA™, NOMAD™, & other 1.375x24 threaded suppressors

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The Taper Mount PLAN-A™ adapter provides a Griffin Taper Mount interface for Silencerco® Hybrid™, OMEGA™, and Harvester 338™ as well as DEAD AIR ARMAMENT™ NOMAD™, and other suppressors with mount interface inside diameter threading of 1.375x24.   No proprietary tools required.  Machined in our Watertown headquarters from billet 17-4 stainless steel, this adapter provides a precision made interface that gives you access to nationally recognized Griffin Taper Mounts and accessories.   Precision, durability, and value are at the core of Griffin product design and manufacturing.  This product allows you to affordable kit up with the best muzzle devices in the industry. 

The exposed length or length added of the Plan-A™ when installed is .430".  This allows for a wide range of taper mount accessories to be fitted to the suppressors.  

  • 17-4 Stainless Steel
  • H900 Heat treated
  • 2.1 Ounce Weight
  • Taper Mount Repeatability and versatility
  • Made in the USA


Silencerco® is a federally registered trademark of Silencerco LLC. and is one of many trademarks owned by Silencerco LLC. Griffin Armament is an independent manufacturer of parts and accessories that fit Silencerco® products, however it is not affiliated with or endorsed by Silencerco LLC.  The use of Silencerco® on this page is merely to advertise the sale of compatible parts or components.  


DEAD AIR ARMAMENT™ and NOMAD™ are trademarks of SOUND MODERATION TECHNOLOGIES LLC®. and are two of many trademarks by SOUND MODERATION TECHNOLOGIES LLC®. Griffin Armament is an independent manufacturer of parts and accessories that fit SOUND MODERATION TECHNOLOGIES LLC products, however it is not affiliated with or endorsed by SOUND MODERATION TECHNOLOGIES LLC®.  The use of NOMAD™, DEAD AIR ARMAMENT™, and SOUND MODERATION TECHNOLOGIES® on this page are merely to advertise the sale of compatible parts or components.  

Type Of Part:
Attachment System:
Taper Mount
Thread Pitch:

23 Reviews

  • 5
    Form 1 stuff

    Published by Cory Davis on 8th Dec 2021

    Fits asr pattern 1.375x24 form 1 tubes like a glove. Working perfect on my shrimp gang designs sandy shrimp L tube.

  • 5
    Plan a

    Published by Parker on 17th Nov 2021

    Nice looking product and fast shipping. I have only fired 10 rounds with it but works as intended.

  • 5

    Published by JumboDakotaSmoke on 28th Oct 2021

    Blown away by the quality of this mount adapter. Attached it to my F1 can which I'm running on my PCC with a Hammer Comp. Could not recommend GA more!

  • 5

    Published by J Huff on 29th Sep 2020

    Fit perfect! Great product at a great price!

  • 5
    Plan-A taper Mount

    Published by Chad on 16th Jun 2020

    I recently switched all my eForm1 cans over to run Griffin brakes which also includes using the Plan-A taper mount. The build quality, fit and finish are outstanding. I've used Griffin products in the past and will continue to do so. Great company, great products.

  • 5

    Published by Michael on 10th May 2020

    I was not let down when I went to my PO BOX to pick up the last thing needed to complete my Form 1 Suppressor build. The fit, finish and functionality of this Taper Mount Adapter is outstanding! Very happy with Griffin Arms products!

  • 5
    Best plan

    Published by Quality on 30th Apr 2020

    I had my AAC suppressors back ends cut off and threaded by Ecco to accept the 1.375 options. Couldn’t be happier with the quality, lock up, and comp/brake/flash options by Griffin. I have a lot of 51t mounts to ditch now.

  • 5
    Awesome adapter

    Published by Kristopher Rocha on 15th Dec 2019

    I got this to go along with my Minimalist Brake to use on my Turbo K suppressor. Great design and helps keep my suppressor in it shortest configuration.

  • 5
    Good to go!

    Published by MP on 10th Sep 2019

    Bought both a Plan A Saker and Plan A Omega to mount my various SiCo suppressors to the wonderful Griffin taper mount brakes. I like the taper mount so much, I am going to mount minimalist brakes to a couple of my DT hunting rifles for use with both my SiCo and Griffin cans. I like the taper mount over direct thread for the lock-up and thread protection.

  • 5

    Published by Aaron on 9th Jul 2019

    I hated having so many QDs to deal with, and this simple but still complex mount eliminates the ASR from my life. I wish it was this easy with the 51t.