The Angstadt Arms 3-Lug Muzzle Adapter (brand part number AA093LSD28) converts a 9mm Luger barrel threaded 1/2×28 to a universal 3-lug interface for quickly mounting compatible pistol-caliber accessories. Angstadt Arms machines this adapter from hardened steel and finishes it in black nitride for corrosion resistance at the muzzle, and the tri-lug interface works with any pistol-caliber accessory built to that same 3-lug standard, including the company’s own 3-Lug QD Blast Shield. Shims aren’t required for a standard install, though they’re available if specific clocking is desired, and Angstadt Arms specifically notes not to use a crush washer with this adapter. At just 1.42 inches long and 0.9 ounces, it adds a quick-attach mounting point without meaningfully changing the gun’s balance.

Key Specifications

• Converts 1/2×28 threaded 9mm barrels to a universal 3-lug interface.
• Threaded for standard 1/2×28 9mm barrel threading.
• Machined from hardened steel for durability at the muzzle.
• Finished in black nitride for corrosion resistance.
• Does not require shims for a standard install; shims are available for specific clocking.
• Do not use a crush washer with this adapter, per the manufacturer.
• Measures 1.42 inches long.
• Weighs approximately 0.9 ounces.
• Compatible with the Angstadt Arms 3-Lug QD Blast Shield and other 3-lug pistol-caliber accessories.

Frequently Asked Questions

Do I need shims to install this adapter? No, shims aren’t required for a standard install, though they’re available if specific clocking is desired.

Can I use a crush washer with this adapter? No, Angstadt Arms specifically advises against using a crush washer with this part.

What accessories is the 3-lug interface compatible with? Any pistol-caliber accessory built to the universal 3-lug standard, including the Angstadt Arms 3-Lug QD Blast Shield.

Buy the Angstadt Arms 3-Lug Muzzle Adapter – 9mm, 1/2×28

Add a quick-attach 3-lug mounting point to your 9mm build. Order it from our Angstadt Arms lineup, part of our small handgun parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.