PISTON M16X1LH Manufacturer Model Number: AC28 Manufacturer: SilencerCo Model: Adapter Caliber: 45 ACP Type: Accessory-Silencer Accessories Item Type: Accessory Shipping Weight: 0.1 Feature: Piston for Osprey/Octane Feature: Thread for HK USP-T,HK45T Optic Adjustable Objective: false Optic Reticle Illuminated: false