The Yankee Hill Machine Nielsen Piston is a precision suppressor accessory engineered for shooters running direct-impingement or other host firearms with YHM's booster assembly ecosystem. If you're tuning a Nielsen-style booster setup and need to dial out POI shift or match your piston to a specific host rifle, this component gives you the adjustability that makes a suppressed firearm shoot like it isn't suppressed. Built from heat-treated 17-4 stainless steel, it resists corrosion through years of hard use and cleaning solvents—a detail that matters when your suppressor spends its life downrange.

Weighing just 1.40 ounces, the Nielsen Piston integrates into YHM's booster housing (YHM-2055) and works with many common pistol suppressors beyond the YHM ecosystem, making it a versatile choice if you're mixing platforms or upgrading an existing can. The real advantage here is the 10 adjustment points: instead of guessing your zero, you can systematically dial out impact shifts and get repeatable, reliable performance. That level of control is what separates a suppressor that fights your gun from one that shoots true.

Available in multiple thread patterns to match most firearms, the Nielsen Piston works with Sidewinder M2 suppressors. (Original Sidewinder models are not compatible.) Whether you're fine-tuning a long-range bolt gun, dialing in a duty rifle, or chasing accuracy on a semi-auto platform, this piston gives you the adjustment range to get there without buying a new booster or can.

Key Features

• 10 adjustment points for POI tuning and impact shift correction
• Heat-treated 17-4 stainless steel construction for durability and corrosion resistance
• Compatible with YHM booster housing YHM-2055 and many popular pistol suppressors
• Works with Sidewinder M2 suppressors
• Lightweight at 1.40 oz
• Available in multiple thread patterns to fit most firearms

Specifications

Weight	1.40 oz
Material	Heat-treated 17-4 stainless steel
Adjustment Points	10
Compatible Booster	YHM-2055
Compatible Suppressors	Sidewinder M2; many popular pistol suppressors

Frequently Asked Questions

Will this Nielsen Piston work with my original Sidewinder suppressor?

No. The Nielsen Piston is compatible with Sidewinder M2 suppressors, but not the original Sidewinder model.

What firearms can I use this piston on?

The Nielsen Piston is available in multiple thread patterns to fit most firearms. Verify your specific host rifle's thread pattern when ordering to ensure proper fit.

How do the 10 adjustment points work?

The piston features 10 adjustment positions that allow you to zero any point-of-impact shift caused by the suppressor on your host firearm, giving you tuning control without replacing the booster or can.

Is this piston compatible with suppressors other than YHM cans?

Yes. While it integrates with YHM's booster housing (YHM-2055), it also works with many popular pistol suppressors beyond the YHM brand.