S-556 5.56MM BLK SILENCER Manufacturer Model Number: U07-0433C01 Manufacturer: LWRC Model: S-556 Caliber: 5.56mm | 6mm Type: NFA - Silencer Item Type: NFA Finish: Black C-Series Cerakote Overall Length: 5.125" Weight: 17.5 oz. Shipping Weight: 1.0 Feature: 1/2X28 QD Flash Hider Feature: Wire EDM Bore Feature: Full-Auto Rated Optic Adjustable Objective: false Optic Reticle Illuminated: false