The JK Armament JK155PISTON5X28BN Piston 9mm Luger 1/2"x28 Nitride Stainless Steel For Pistol is a precision-machined booster piston designed to securely mate your threaded 9mm pistol barrel with a compatible suppressor. Crafted from durable 17-4 PH stainless steel with a sleek black nitride finish, it offers excellent corrosion resistance and a clean, minimalist profile that integrates smoothly with modern handgun setups.

This piston is purpose-built for pistols chambered in 9mm Luger using the common 1/2"x28 thread pattern, making it an ideal choice for range use, training, and suppressed shooting where reliable function is critical. Its robust stainless steel construction and carefully engineered geometry help ensure consistent alignment between barrel and suppressor. Backed by JK Armament’s reputation for thoughtful design and quality machining, this piston is a dependable upgrade for shooters who run suppressed handguns.

Key Features:

• Manufacturer: JK Armament
• Model: JK155PISTON5X28BN
• Caliber: 9mm Luger (9x19 Parabellum)
• Color: Black
• Diameter: 1.55 Inches
• Material: Stainless Steel
• Series: Piston
• Thread Pattern: 1/2"x28