PLAN-A™, Taper Mount Adapter 1.125"x28 for Griffin Pistol silencers and others

Now: $89.95
(You save )
(12 reviews) Write a Review

The Taper Mount PLAN-A™ adapter provides a low profile (only adds .430" in length) Griffin Taper Mount interface for Griffin pistol silencers, and other suppressors with mount interface inside diameter threading of 1.125x28 such as Silencerco® Octane™, Octane 9K™, Octane 45k™ and Rugged Suppressors® Obsidian™.   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, performance, durability, and value are at the core of Griffin product design and manufacturing.  This product allows you to affordably kit up with the best muzzle devices in the industry.  The Most Versatility in Taper Mounts for this part is the Minimalist Stealth Flash Hider  They are available in several thread pitches both 9mm and 45 CAL.  Another options is the Hammer Comp in 1/2x28 9mm
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 PH SS Billet Machined
  • Black Nitrided
  • only adds .430" in length to host silencer
  • 1.1 Ounce Weight
  • Taper Mount Repeatability and versatility
  • Made in the USA

 Available Taper Mounts to support use of this Taper Mount adapter for pistol suppressors: 

Minimalist Stealth Flash Hider


Part Description Part # UPC
Mini Flash Supp 9mm    1/2x28 TMMFH9MM1228 791154083703
Mini Flash Supp 9mm    1/2x36  TMMFH9MM1236 791154083710
Mini Flash Supp 9mm    13.5x1LH TMMFH9MM1351LH 791154083727
Mini Flash Supp 45acp   11/16x24 TMMFH45111624 791154083734
Mini Flash Supp 45acp  .578x28  TMMFH4557828 791154083741
Mini Flash Supp 45acp   5/8x24  TMMFH455824 791154083758


Hammer Comp

1/2x28 Taper Mount Hammer Comp 9mm TMHC91228 791154083222



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.  

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

Type Of Part:
Attachment System:
Taper Mount

12 Reviews

  • 5
    Plan-A Taper Mount Adapter

    Published by Mike H. on 24th May 2024

    Fit and finish are the quality you'd expect from Griffin. This adapter is a great option for using suppressors across different hosts with taper mount that don't require the blast shield. I use this for the Resistance 9 on an AKV.

  • 5
    Obsidian 45

    Published by Unknown on 8th Dec 2023

    I bought this so I could use tapermounts with the obsidian 45. If fits perfectly and i can now mount the can up to anything with a tapermount. It's worth noting that having the griffin tool is helpful for getting it appropriately tight, or getting it off if it snugs up too much. It doesn't come with the tool. The slots almost look like a castle nut wrench would work, but it won't... it's not the right size.

  • 5
    1st plain taper mount

    Published by Jake on 6th Jul 2023

    This is the first plain taper mount that I've used from Griffin and it worked spectacularly to make my Rugged Obsidian 45 faster to swap around on my BigBoyX 44 mag, Homesteader 9mm, and AR9 pistol.

  • 5
    Plan A Taper Mount for Pistols

    Published by G Rocker on 10th Oct 2022

    Works great on my Obsidian 9. Makes it easy to mount on different rifles with minimalist taper muzzle brakes

  • 5
    PLAN-A™, Taper Mount Adapter

    Published by Web Beste on 21st Jan 2022

    A high quality piece that allows user to switch the suppressor between different host firearms with a compatible muzzle device.

  • 5
    Revolution taper mount adapter

    Published by Granville on 25th Nov 2021

    These well machined and finished components greatly expand the capabilities of the Revolution suppressor. A must have for anyone who desires to mount this can on taper mount muzzle devices.

  • 5
    Where have you been?

    Published by James Harmer on 3rd Mar 2021

    I purchased this mount along with a 9mm hammer comp for my AR9 5.5" SBR. I love this mounting option, Absolutely Amazing!!!

  • 5
    Plan A Taper Mount

    Published by Eric A on 8th Dec 2020

    Works perfectly with my EZ Brake and Optimus for a compact configuration on my 9mm AR SBR. Fit and finish are great as usual with Griffin products.

  • 5
    Perfect for optimus

    Published by Unknown on 7th Aug 2020

    Paired this with my optimus to replace the minimalist blast shield for a shorter package on a 300bo mk18. Would be nice if it threaded directly to the optimus rather than the booster housing but still looks and works great as is.

  • 5
    Awesome on Optimus

    Published by John Culpepper on 10th Dec 2019

    Fit and finish is nothing less than what you’d expect from Griffin.