Which suppressors are compatible with 3-lug adapters?

Suppressors from Silencerco, Dead Air, Rugged, and Q (with the proper mount) are commonly compatible with 3-lug systems.

What thread sizes are available?

Most 3-lug adapters are available in 1/2x28, 1/2x36, and 5/8x24 thread pitches to match different barrel configurations.

Why choose a 3-lug adapter over direct thread?

3-lug systems allow for faster, tool-free suppressor changes and avoid thread wear or misalignment over time.

3-Lug Adapter for Suppressor – Quick Attach Mount for MP5, AR-9, PCC

3-lug Adapter 1/2x28

**Yankee Hill Hd 3-lug Adapter Blk** $135.12

SilencerCo Low Profile 45acp 3-lug Mount $119.46

SilencerCo Low Profile 9mm 3-lug Mount $119.46

**Gemtech Mm9 3-lug Mp5-style Female** $170.17

**Angstadt Arms 3-lug/blastwave Wrench** $33.75

**Rugged Obsdn45 3-Lug 11/16x24** $67.35

**Rugged 3-Lug Adapter 13.5x1lh** $67.35

**Rugged Obsidian 9mm 3-Lug Mount** $101.09

**Griffin 9mm 3-Lug Coupler Kit** $123.00

**Ghost-M Suppressor 3-Lug Adapter** $112.84

**Griffin 3-Lug Adapter 13.5x1lh** $74.70

**Angstadt Arms 3-Lug 9mm M13.5x1 Lh** $47.50

**Angstadt Arms 3-Lug 9mm 1/2x28** $47.50

Fast Suppressor Mounting – Without Tools or Threads

A 3-lug adapter for suppressor use is the go-to solution for fast, repeatable suppressor mounting on 9mm and .45 caliber firearms. Popular with MP5 owners, AR-9 builders, and anyone running a 3-lug muzzle device, these adapters allow tool-free quick-detach installation — no threading, no alignment tools, and no fuss.

Perfect for Silencerco, Dead Air, Rugged, and other modular suppressors, 3-lug adapters give you the confidence to train or deploy with a silencer securely mounted in seconds.

🔧 What Is a 3-Lug Suppressor Adapter?

The 3-lug system was originally developed for the HK MP5 and allows suppressors to be twist-locked into place using a spring-loaded collar. Today, it’s widely used for:

Pistol-caliber carbines (PCCs)
AR-9 builds
Subgun platforms (MP5, Uzi clones)
Scorpion EVO and B&T firearms

No Loctite, no thread wear — just push, twist, and shoot.

🔁 Available Thread Sizes

1/2x28 – Standard for 9mm AR platforms and threaded pistols
1/2x36 – Common for blowback PCCs
5/8x24 – For .45 ACP and .300 BLK barrels
All adapters are built from hardened steel with precision tolerances for suppressor safety and alignment.

🎯 Compatible Suppressors

Silencerco: Omega 9K, Octane 9/45, Hybrid 46
Rugged: Obsidian 9, Obsidian 45
Dead Air: Wolfman, Ghost-M
Q: Erector 9 (with 3-lug interface)
🛒 Shop All Suppressor Mounts & Accessories →

❓ FAQs – 3-Lug Adapter for Suppressor

What is a 3-lug adapter used for?

It allows a suppressor to be mounted to a 3-lug muzzle device — common on PCCs like the MP5 — with a simple push and twist.

Do I need a different adapter for each suppressor?

No. Most suppressors accept universal 3-lug interfaces, but always confirm compatibility with your suppressor's manufacturer.

Is 3-lug better than direct thread?

For high-use platforms, yes. 3-lug systems allow quick detachment, reduce thread wear, and offer more consistent alignment.

Will this fit my MP5 clone or AR-9?

Yes — if your barrel has a 3-lug muzzle device, this adapter is the correct interface to mount your suppressor.