IWS6 6MM K SILENCER 1/2X28 BLK Manufacturer Model Number: IWS6K Manufacturer: IWI - Israel Weapon Industries Model: IWI Silencer 6MM K Caliber: 5.56mm | 6mm Type: NFA - Silencer Item Type: NFA Finish: Black Overall Length: 4.9" Weight: 14 oz. Shipping Weight: 0.0 Feature: 1/2x28 HUB+ Mount Feature: Reduced Back Pressure Design Feature: No Barrel Restrictions Optic Adjustable Objective: false Optic Reticle Illuminated: false