Cart “Magpul Industries MBUS 3 Back-Up Rear Sight Rapid-Select Rear Aperture System Ambidextrous Push-Button Deployment Fits Picatinny Rails Black MAG1167-BLK” has been added to your cart. Continue shopping Remove item Thumbnail image Product Price Quantity Subtotal × Magpul Industries MBUS 3 Back-Up Rear Sight Rapid-Select Rear Aperture System Ambidextrous Push-Button Deployment Fits Picatinny Rails Black MAG1167-BLK $56.95 Magpul Industries MBUS 3 Back-Up Rear Sight Rapid-Select Rear Aperture System Ambidextrous Push-Button Deployment Fits Picatinny Rails Black MAG1167-BLK quantity $56.95 Update cart Cart totals Subtotal $56.95 Tax $0.00 Total $56.95 Proceed to checkout