Front sight Quick Detachable Low Profile Front Sight Tower Complete with A2 Square Post Assembly to Fit all Picatinny/Weaver-style Rails Thumb Nut with Locking Retention Designed to Use with Handguard Rails or Low Profile Gas Block Precision Elevation Adjustments to Enhance Shooting Accuracy Rear sight Dramatically Improves Sight Pictures and Enhances Shooting Accuracy Rugged Aluminum/Steel Construction with Matt-Black Finish to Withstand the Harshest Environment and to Meet Most Demanding Requirements Precise MOA Windage and Elevation Adjustment in Accordance with Current Military Requirements Spring-loaded Detent for Positive and Repeatable W/E Adjustments A2 Style Dual Apertures with the Larger Rapid Target Acquisition Aperture for CQB Operations and the Smaller Precision Aperture for High Accuracy Aiming Operations Exact Height to Co-witness with Standard Front Sight and Most Electronic Dot Sights One Piece Integral Picatinny Mounting Deck Fits All Flat Tops Equipped with Locking Retention Thumb Nut