DD SG-556 1/2-28 BLK SUPPRESSOR | 06-140-04249 Manufacturer Model Number: 06-140-04249 Manufacturer: Daniel Defense Model: SG-556 Caliber: 223 Rem | 5.56 NATO Type: NFA - Silencer Item Type: NFA Finish: Black High-Temp Cerakote Overall Length: 7" Weight: 22 oz. Shipping Weight: 2.0 Feature: HUB Std. 1.375-24 UNS Mount Optic Adjustable Objective: false Optic Reticle Illuminated: false