The YHM Sidewinder +M2 Carbine Adapter (brand part number YHM-3250) is a 5/8-24 threaded mount built by Yankee Hill Machine for .30 caliber muzzle devices. It’s part of YHM’s Sidewinder line, engineered to let shooters quickly attach compatible muzzle hardware to a threaded barrel without machining or gunsmith work. The adapter threads directly onto standard 5/8-24 muzzle threads, giving builders a factory-toleranced mounting point instead of relying on generic hardware. It’s a purpose-built piece for anyone running the Sidewinder +M2 system on a .30 caliber AR-platform rifle.

Key Specifications

• Classified as a mount, functioning as a direct-thread adapter rather than a standalone muzzle device.
• Model designation is the Sidewinder Direct Thread Adapter, part of YHM’s Sidewinder +M2 system.
• Threads onto standard 5/8-24 tpi muzzle threading found on .30 caliber AR-platform barrels.
• Manufactured by Yankee Hill Machine, a dedicated maker of AR-platform muzzle hardware.
• Measures approximately 5.6 inches overall, sized to accept the Sidewinder +M2 attachment.

Frequently Asked Questions

What thread pitch does this adapter use? It’s cut for 5/8-24 tpi, the standard thread pattern on most .30 caliber AR-platform barrels.

What system does this work with? It’s built specifically for YHM’s Sidewinder +M2 muzzle device system.

Who makes this adapter? Yankee Hill Machine, a US manufacturer specializing in AR-platform muzzle hardware.

Buy the YHM Sidewinder +M2 5/8-24 Carbine Adapter

Get the correct factory-toleranced mounting point for your Sidewinder +M2 build. Order it from our Yankee Hill Machine lineup, part of our Class 3 parts and accessories selection, at our Lubbock, Texas gun shop for fast, direct shipping.