SOCOM556 RC3 556 BLK SLNCR LBP SOCOM556-RC3-BK Manufacturer Model Number: SOCOM556-RC3-BK Manufacturer: SureFire Model: SOCOM556-RC Gen3 Black Caliber: 223 Rem | 5.56 NATO Type: NFA - Silencer Item Type: NFA Finish: Ionbond, Cerakote Matte Black Overall Length: 6.43" Weight: 17 oz. Shipping Weight: 2.0 Feature: Low Back Pressure Optic Adjustable Objective: false Optic Reticle Illuminated: false