Yankee Hill Sidewinder M2 .45 ACP Suppressor .578×28

The Yankee Hill Machine Sidewinder M2 is a direct-thread suppressor optimized for .45 ACP pistol platforms. It uses a redesigned booster that accepts the industry’s unofficial standard piston, enabling interchangeability with compatible pistons and tool-free piston swaps via a redesigned rear cap. The unit is user-serviceable: the baffle and Nielsen device can be removed for cleaning and maintenance using the provided disassembly tool. The Sidewinder M2 includes 12 index points that allow adjustment of point of impact while remaining attached to the host firearm, and was tested to Mil‑Std 1474D with an average dry sound signature reported as 133 dB on a Glock G21 using 230 gr FMJ.

Key Specifications

• Caliber is .45 ACP for compatible pistol platforms.
• Thread pattern and mount is .578×28 (direct thread) with an RH piston.
• Diameter measures 1.375 inches for compact profile and sight clearance.
• Finish is Type III hardcoat anodized (black) for corrosion resistance and wear protection.
• Reported decibel rating is 133 dB (dry) when tested to Mil‑Std 1474D on a Glock G21 with 230 gr FMJ.
• Rated for full-auto use where applicable and legal.
• Baffle system is a mono-core, hardcoat anodized design for durability and weight savings.
• Design is user-serviceable, allowing removal of the baffle and Nielsen device for maintenance.
• Features 12 index points to adjust point of impact while attached to the host firearm.
• Uses an industry-standard piston compatible with other manufacturers’ pistons for interchangeability.

Built to be lightweight, serviceable, and compatible with common piston standards, the Sidewinder M2 offers a practical suppressor option for informed shooters seeking a durable, user-maintainable unit for .45 ACP pistols. Its serviceability, indexing capability, and tested sound signature make it suitable for range use and applications where a compact, direct-thread pistol suppressor is appropriate. The design also supports use with subsonic .300 BLK on appropriately barreled rifles where applicable.