Silencer adapter for Ruger Mark IV, III and II

(3 customer reviews)


Your .22 LR Ruger pistol is not threaded but you still want to use a suppressor? We have the solution: the silencer adapter for Ruger Mark IV, III and II. A custom blued steel part generating a 1/2×20 TPI (1/2 UNF) or 1/2×28 TPI (1/2 UNEF) thread.

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The silencer adapter for Ruger Mark IV, III and II : No thread? No problem

Ruger pistols derived from the Ruger Standard come in 4 generations, from Mark I to Mark IV. There are different variants within each generation, depending on whether you want to practice plinking, precision shooting or even hunting. Some of these variants are threaded, others are not. This is where our silencer adapter for Ruger Mark IV, III and II comes in.

Because the .22 LR is particularly easy to silence. But your gun still need a thread to accommodate a suppressor. For those who are not so lucky, we offer an ingenious system squeezing against the front sight of the gun. You will thus obtain a 1/2 UNF or 1/2 UNEF thread ready to use, without modification of your weapon. It’s simple, reversible, and as effective as a direct thread.

Compatibility of this adapter

This silencer adapter for Ruger Mark IV, III and II will work on all pistols with a cylindrical heavy barrel. We traditionally refer to them as “bull barrel”, but “fluted bull barrel” and “slab sided bull barrel” are also welcome. This includes Ruger Target,Hunter, 22/45 or Competition.

On the other hand, tapered barrels (also known as “pencil barrel”) will not be compatible. The Ruger Mark II Target with 10″ barrel neither.

Once the adapter is mounted on the gun, you will be able to screw any suppressor into it in 1/2×20 TPI or 1/2×28 TPI. As a reminder, the 1/2 UNF (also known as 1/2×20 TPI) is the standard thread for .22 LR silencers in Europe. On the other hand, the 1/2 UNEF (also known as 1/2×28 TPI) is the standard thread for .22 LR silencers in the USA.

To protect this interface from shocks when no silencers occupy it, consider having a proper barrel thread protector.

How do I install the silencer adapter for Ruger Mark IV, III and II?

Our system is broken down into four parts: the adapter’s body, its tightening nut, and two aluminum spacers. Start by sliding the tightening nut on your barrel, then the large spacer, then the little spacer. These two aluminum spacers will be used to protect the finish of your barrel from scratches, and to transmit the pressure of the tightening nut by leaning on the front sight.

Turn the two spacers so that their openings are no longer facing the front sight. Then slip the adapter’s body on the barrel, encompassing them. Then screw the tightening nut on the adapter’s body, to press it against the muzzle of the barrel. The inside of the adapter’s body is conical, so the whole assembly will always remain perfectly centered. This keeps the pistol accurate, with optimal bushing.

The perfect solution to use a silencer on an unthreaded Ruger Mark IV, III or II without weapon transformation.

Additional information

Weight 120 g
Dimensions 76 × 22 mm


Accessory thread

1/2 UNF (1/2×20 TPI), 1/2 UNEF (1/2×28 TPI)


Blued steel

3 reviews for Silencer adapter for Ruger Mark IV, III and II

  1. Anonymous (verified owner)

    Excellent bit of engineering design and metalwork. Lovely tight tolerances, works simply and perfectly.

  2. Jonas N. (verified owner)

    Verry high quality part, i am satisfied.

  3. Anonymous (verified owner)

    It’s very easy to put on and take off. High quality precision machine work and a beautiful finish. Great follow-up by the business owner when I encounter some minor issue with the installation. Assistance was provided on how to he proper install and the problem was resolved. I highly recommend this business if you are in the market for a high quality adaptor. They do care about their customers.

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