CLOSED TINE FH 5.5622 1/2X28 SFCT-556-1/2-28 Manufacturer Model Number: SFCT-556-1/2-28 Manufacturer: SureFire Model: Closed Tine Flash Hider Caliber: 5.56 x 45mm Type: Accessory-Flash Hiders Item Type: Accessory Overall Length: 2.3" Weight: 2.6 oz. Shipping Weight: 0.25 Optic Adjustable Objective: false Optic Reticle Illuminated: false