The YHM Nielsen Piston, 9mm, 1/2×28 Thread (brand part no. YHM-2060-28) is a replacement piston from Yankee Hill Machine for 9mm pistols with a 1/2×28 barrel thread. It works with the YHM Booster Assembly, YHM Sidewinder M2 suppressors and many popular pistol suppressors. The piston is built from heat-treated 17-4 stainless steel and offers 10 adjustment points to zero any change in point of impact. It is the part to order when you only need a new piston, or when you are fitting a booster-style suppressor to a 9mm host cut 1/2×28.

Key Specifications

• The caliber is 9mm, so this piston is sized for 9mm pistols.
• The thread is 1/2×28, so match it to your barrel before ordering.
• It is built from heat-treated 17-4 stainless steel for durability and corrosion resistance.
• It has 10 adjustment points, which let you zero out any impact shift caused by the suppressor.
• The weight is 1.40 ounces, light enough to add almost nothing at the muzzle.
• It is compatible with the YHM Booster Assembly, YHM wording for its Nielsen booster.
• It also works with YHM Sidewinder M2 suppressors and many popular pistol suppressors.
• It is not compatible with the original Sidewinder, a distinction to check before ordering.
• It is made in the USA by Yankee Hill Machine.

Frequently Asked Questions

Which thread pattern is this piston? This version is the 9mm piston cut for a 1/2×28 barrel thread. Yankee Hill Machine also lists 9mm versions in 1/2×36 and M13.5×1 LH, plus .45 and 10mm versions.

What is it compatible with? It is compatible with the YHM Booster Assembly, YHM Sidewinder M2 suppressors and many popular pistol suppressors. It is not compatible with the original Sidewinder.

What does the adjustment feature do? The piston has 10 adjustment points that let you zero any impact shift when the suppressor is installed.

Buy the YHM Nielsen Piston, 9mm, 1/2×28 Thread

A piston that matches your barrel thread is what keeps a Nielsen-style setup working, and this one is cut for 9mm barrels threaded 1/2×28. Order it from our Class 3 parts and accessories selection at our Lubbock, Texas gun shop for fast, direct shipping.