Yankee Hill Machine Nielsen Piston 9mm M13.5×1 LH

Description

The Yankee Hill Machine (YHM) Nielsen Piston is a purpose-built piston for use with compatible 9mm pistol suppressor systems. It is constructed from heat-treated 17-4 stainless steel for durability and corrosion resistance and provides adjustable indexing to eliminate impact shift. The piston is designed to work with YHM’s booster housing YHM-2055 and many common pistol suppressors; it is not compatible with the original Sidewinder model.

Key Specifications

• The piston is built from 17-4 stainless steel for strength and corrosion resistance.
• The thread fit is M13.5×1 LH to match compatible muzzle devices and suppressors.
• The listed caliber is 9mm for use with compatible 9mm systems.
• The piston provides 10 adjustment points to zero any impact shift.
• The product type is a piston designed for suppressor booster assemblies.
• The piston weight is approximately 1.4 oz.
• Finish is specified as stainless steel.
• Compatible with YHM booster housing YHM-2055 and many pistol suppressors.
• Not compatible with the original Sidewinder; will work with Sidewinder M2.
• The NFA thread pattern is listed as 13.5x1mm LH.

Compact and engineered for reliable service, the YHM Nielsen Piston offers a robust, adjustable solution for respected suppressor platforms. Its heat-treated 17-4 stainless construction and indexed adjustment capability make it a durable choice for users seeking consistent, repeatable alignment in 9mm suppressor assemblies. Whether outfitting a dedicated suppressed pistol system or replacing a worn piston, this component provides a practical balance of durability and function.