Other Details Manufacturer: Silencer Co Manufacturer Part Number: AC1564 Adjustable Objective: False canDropship: True Drilled and Tapped: False Finish: Matte Finish Color: Black Illuminated Reticle: False Material: Stainless Steel Model: Bravo NFA Thread Pattern: .578x28 Product Type: Accessory-Silencer Accessories Scope Cover Included: False Series: Direct Thread Mount Similar Items: SUPACC Size: .578x28 Thread Pattern: 1/2"-28 tpi