HEXIUM 556 SILENCER HEXIUM556 Manufacturer Model Number: HEXIUM556 Manufacturer: SIG SAUER Model: Hexium 556 Caliber: 223 Rem | 5.56 NATO Type: NFA - Silencer Item Type: NFA Overall Length: 6.2" Weight: 11 oz. Shipping Weight: 0.0 Feature: HUB Taper Direct Thread Mount Feature: End Cap Mounting System Feature: 3D Printed Titanium Core Optic Adjustable Objective: false Optic Reticle Illuminated: false