Other Details Manufacturer: Gemtech Manufacturer Part Number: 12152 Adjustable Objective: False Caliber/Gauge: .223 REM/5.56 NATO canDropship: True Color: Black Description: 1/2X28 Drilled and Tapped: False Illuminated Reticle: False Model: QUICKMOUNT NFA Thread Pattern: 1/2x28 Product Type: Accessory-Muzzle Brakes Scope Cover Included: False Subcategory: Muzzle Devices