SIDEWINDER PISTON 40SW 9/16X24 Manufacturer Model Number: YHM-3235-24 Manufacturer: Yankee Hill Machine Company Model: Adapter Caliber: 40 S&W Type: Accessory-Silencer Accessories Item Type: Accessory Shipping Weight: 0.1 Feature: 40 S&W Piston For Sidewinder Optic Adjustable Objective: false Optic Reticle Illuminated: false