SILENCERCO AC2604 3 LUG MUZZLE DEVICE 1/2X28 9MM TRI-LUG

The SilencerCo 3-Lug Muzzle Device (AC2604) is a steel suppressor mounting adapter threaded at 1/2x28 for 9mm host firearms, designed to give pistol caliber carbine and pistol owners one of the fastest and most secure quick-attach suppressor mounting interfaces on the market. If you run a 9mm host with a fixed or threaded barrel and want a reliable tri-lug mounting solution compatible with the SilencerCo Octane, Omega K, and related suppressor lines, this is the purpose-built adapter that makes it possible.

Key Features

• Part number: AC2604
• Caliber: 9mm
• Thread pitch: 1/2x28
• Material: Steel
• Finish: Matte black
• Mount interface: 3-lug, 9mm specification
• UPC: 816413025154
• Compatible suppressors: Octane Series, Omega K Series, Hybrid 46 (requires Bravo Piston Mount), Hybrid 46M (requires Charlie Piston Mount), Omega 36M (requires Charlie Piston Mount)
• 3-lug mount required: Sold separately, 9mm specification only
• Intended host type: Semi-automatic pistol caliber firearms with fixed or threaded barrels

Special Features

• The three-lug interface geometry originated in HK military designs and provides a push-forward, quarter-turn attachment motion that locks the suppressor onto the host in under one second without tools.
• This muzzle device is manufactured specifically to 9mm tri-lug dimensions and will only interface correctly with SilencerCo 9mm 3-lug mounts. The 9mm and .45 caliber 3-lug systems use identical housings but different bore diameters and are not cross-compatible.
• Steel construction handles the sustained heat and pressure cycles generated during extended 9mm suppressed fire without deformation or loosening at the lug engagement points.
• The compact profile adds minimal length to the host barrel, keeping overall package length manageable on pistol caliber carbines and full-size pistols with threaded barrels.
• The muzzle device ships ready to install with no timing or indexing required, as the 3-lug interface does not depend on clocking position for suppressor alignment.
• SilencerCo offers this same 3-lug design across seven thread pitches, allowing suppressor owners to run the same mount interface across multiple 9mm host firearms without purchasing a separate suppressor for each.

Practical Benefits

• If you own multiple 9mm hosts with 1/2x28 threaded barrels, adding this muzzle device to each gives you the ability to move a single suppressor between all of them using the same mount, eliminating the cost of multiple suppressors.
• The push-and-twist attachment cycle is faster than any Nielsen piston or direct-thread mount currently available, reducing transition time during training and competition drills.
• The 1/2x28 thread pitch is the most common factory thread specification on 9mm pistols and pistol caliber carbines in the current market, making this device compatible with a wide range of hosts including the MP5, CZ Scorpion, Ruger PCC, and most threaded-barrel handguns in 9mm.
• Suppressor owners who train with both a pistol and a carbine in 9mm will find a single SilencerCo 3-lug mount in their suppressor covers both hosts as long as each barrel carries an AC2604 muzzle device.
• The quick-detach interface allows you to remove the suppressor and restore the host to its standard profile in seconds, making it practical to run the same firearm suppressed or unsuppressed based on the situation.
• For the 9mm suppressor owner who wants a fast, dependable, and tool-free mounting solution across multiple hosts, the SilencerCo AC2604 3-Lug Muzzle Device gives your suppressor setup the flexibility and speed that direct-thread mounts simply cannot match.

The SilencerCo AC2604 3-Lug Muzzle Device in 9mm with 1/2x28 thread pitch is a practical choice for suppressed 9mm shooters who demand a fast, secure, and tool-free mounting interface across a wide range of compatible hosts.