Midwest Industries Combat Rifle Sight, 45 Degree Offset, Adjustable Front and Rear, Low Profile, Fully Ambidextrous, Flip-Up, Includes A2 Sight Tool, Black Finish MI-CRS-OSS The Midwest Industries 45 degree offset combat rifle sights for AR15 platform firearms and other continuous rail platforms offer convenient" reliable sights that are ready when you need them and completely out of the way when you don't. Constructed of lightweight 6061 aluminum" these sights are fully ambidextrous" and can be installed to the left or the right side of the firearm.