Yankee Hill Machine | Sidewinder Adapter | YHM-3251

This Yankee Hill Machine Sidewinder direct-thread carbine adapter (YHM-3251) adapts fixed-thread pistol-caliber rifles and pistols to accept Sidewinder-style devices. It is intended to replace the spring retainer, spring and piston for a fixed-thread mount and enable use of Sidewinder units where the original interface differs. The adapter is finished in matte black and is offered in the 1/2-28 thread configuration commonly used on many pistol-caliber platforms.

Product Specifications

• The UPC is 816701019667.
• The model is listed as Sidewinder Direct Thread Adapter.
• The fit is specified as Sidewinder.
• The thread is described as 1/2X28.
• The product type is Mount.
• The subcategory is Suppressor Accessories.
• The finish is described as Matte Black.
• The material information is conflicting between sources and requires review.
• The color is listed as BLACK.
• The overall dimensions are 1.40 x 3.25 x 5.65 (listed).
• The width is 3.2500 (listed).
• The height is 1.4000 (listed).
• The length is 5.6500 (listed).
• Shipping restriction: no direct ship to California.

This adapter provides a straightforward way to adapt fixed-thread pistol-caliber firearms to accept Sidewinder-style devices when the original mount and retention parts differ. It is useful for shooters seeking parts compatibility with Sidewinder systems and for gunsmiths performing conversions where a fixed-thread mount requires replacement retention components. Built and finished to integrate with common PCC form factors, the adapter is a concise solution for fitting Sidewinder units to fixed-barrel platforms.