The AAC Flange Indexing Direct-Thread Adapter in 1/2×28 lets a modular suppressor with an industry-standard 1-3/8-24 threaded rear socket mount directly to a 1/2×28 muzzle. It is an unobtrusive, low-profile design with a muzzle-brake structure that diverts gas and unconsumed propellant away from the projectile aperture. That protects the blast chamber baffle from premature erosion. A tool-featured flange with a square shoulder indexes against the rear face of the host suppressor, and AAC states it should work with most suppressors that use that socket.

Key Specifications

• The output thread is 1/2×28, the standard 5.56 muzzle thread, so the suppressor mounts directly to the barrel.
• The suppressor side is a 1-3/8-24 threaded rear socket, the industry-standard size AAC lists for compatibility.
• A tool-featured flange with a square shoulder indexes against the rear face of the suppressor for a repeatable seat.
• The muzzle-brake structure diverts gas and unconsumed propellant away from the projectile aperture.
• The adapter does not fit Ti-Rant model silencers, which AAC specifically excludes.

Frequently Asked Questions

Will this adapter fit my suppressor? AAC says the Flange Indexing Direct-Thread Adapters should be compatible with most suppressors that have an industry-standard 1-3/8-24 threaded socket. They do not fit Ti-Rant model silencers.

What thread sizes does this adapter convert to? AAC’s direct-thread adapters convert a 1-3/8-24 socket suppressor to 1/2×28 or 5/8×24. This listing is the 1/2×28 version.

Buy the AAC Flange Indexing Direct-Thread Adapter, 1/2×28

Moving a modular suppressor onto a 1/2×28 rifle takes the right adapter, and the flange here seats squarely against the suppressor rear face. We ship it fast and insured from our Lubbock, Texas gun shop, and you can find more suppressor parts and accessories in the same category.