Silencer adapter for SIG & GSG 1911 – 1/2 UNF or 1/2 UNEF

(3 customer reviews)


To enjoy a .22 LR silencer on your handgun, we offer this silencer adapter for SIG & GSG 1911 with male thread to choose. Use it to mount a suppressor in 1/2 UNF (1/2×20 TPI) or 1/2 UNEF (1/2×28 TPI) on your pistol. Compatible with ISSC M22 Gen1 (not protruding barrel).

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How to use this silencer adapter for SIG & GSG 1911 ?

Our silencer adapter for SIG & GSG 1911 allow you to equip your handgun with a suppressor. You will enjoy more discreet shots, enough to shoot without earmuffs when using subsonic ammunitions. The SIG SAUER and GSG 1911 adapter must be screwed onto the M9x0.75 thread of your barrel, inside the slide. Doing so, a 1/2 UNF thread (1/2×20 TPI) or 1/2 UNEF thread (1/2×28 TPI) will protrude outside of it. All you need to do then is to screw on your silencer to this external thread. A barrel thread extension in a way.

Whatever your weapon, we strongly advise against leaving a silencer mounted permanently. On the other hand, you can leave the silencer adapter for SIG & GSG 1911 mounted on the weapon. Your pistol will gain some tactical look and you will just have to screw on your moderator before shooting. To protect the thread of the adaptor when the silencer is not on it, we also sell thread protectors.

Which firearm is compatible with this silencer adapter?

We manufacture this silencer adapter for the SIG 1911-22 pistol made by SIG Sauer in. 22 LR. But in practice, it can also be used on other threaded guns with M9x0.75 thread. For example, GSG 1911 (almost identical to SIG SAUER 1911) or first generation ISSC M22. Virtually, every .22 LR weapons whose barrel has a M9x0.75 thread and whose slide can allow through a 14 mm diameter accessory can benefit from it. If you have any doubts about yours, please ask us by email before placing you order.

Which suppressor can I mount on this silencer adapter for SIG & GSG 1911 ?

When ordering, you will choose the male thread of the silencer adapter between two possibilities. 1/2 UNF (also known as 1/2×20 TPI) or 1/2 UNEF (also known as 1/2×28 TPI). Major brands of suppressors manufacture their products in both standards, but some others only do one or the other. So please make sure that you have the correct compatibility between the chosen adapter and the intended silencer.

Generally, the 1/2×20 TPI thread is the standard for European weapons in. 22 LR. So it will be easier to find silencers in 1/2×20 TPI in Europe. Conversely, the 1/2×28 TPI is more used in the USA. It is therefore easier to find suppressors in 1/2×28 TPI there.

Whatever your choice on this page, you will enjoy a high quality silencer adapter, with flawless concentricity. A product made in France on CNC machines.

Additional information

Weight 20 g
Dimensions 31 × 14 mm
Barrel thread





Blued steel

Brand - Manufacturer


3 reviews for Silencer adapter for SIG & GSG 1911 – 1/2 UNF or 1/2 UNEF

  1. paul j. (verified owner)


  2. Stephen M. (verified owner)

    I was very impressed both with the product which is perfect, and also with the speed with which it arrived. Merci beaucoup.

  3. Warren H. (verified owner)

    Excellent addition to my UK specification long barrelled GSG 1911 pistol fits the barrel and allows the usage of a sound moderator when firing in an indoor range I am very please with the product

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