YHM Sidewinder M2 .45 ACP Suppressor — User-Serviceable, 8.35 in, 10.2 oz, Type III Hardcoat Anodized, Matte Black
The Yankee Hill Machine Sidewinder M2 in .45 ACP is a user-serviceable pistol-caliber suppressor built with 6061/7075 T6 aluminum and 17-4 stainless steel booster components. It combines a lightweight, hardcoat anodized matte black finish with a proven Nielsen device and an indexing feature to fine-tune point of impact. At 8.35 inches in length, 1.375 inches in diameter, and 10.2 ounces with piston, it offers a well-balanced, serviceable design made in the United States.
Condition
Overall Condition: Excellent
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: If this suppressor has ever been used, it was used sparingly. The exterior is blemish free. The threads are exceptionally clean and crisp. The baffles are very clean. Overall condition is excellent.
What’s Included
- Yankee Hill Machine Sidewinder M2 .45 ACP suppressor
The Sidewinder M2 is a fully user-serviceable design with a removable baffle stack, end cap, and spring-loaded Nielsen/booster assembly. The outer tube and baffles are aluminum, paired with 17-4 stainless steel components in the booster for strength where it matters. The Type III hardcoat anodized matte black finish provides durable surface protection.
Dimensions are streamlined for a .45-caliber can: 8.35 inches in length with piston, 1.375 inches in diameter, and a listed weight of 10.2 ounces with piston. Scalloped dimples on the rear of the tube aid grip during disassembly, while the front cap uses a three-lobed spanner interface for secure removal and maintenance.
The rear Nielsen device features a toothed locking ring and an indexing capability that allows rotation to fine-tune point of impact. Pistons are swappable to accommodate different thread pitches; the .45 version’s default piston thread is .578-28 RH. Factory guidance includes tightening to 20–30 ft-lb and avoiding the use of washers.
Rated for wet use with a small quantity of ablative per the manual, the Sidewinder M2 continues the lineage introduced in 2015 as the successor to the Cobra M2, incorporating upgraded 17-4 stainless booster components. Tube markings identify the maker, location, model, and caliber. Made in the United States.