This durable, all steel sight mount set sits on the same plane to give you a front and back iron sight. The sights fold out of the sight line with the push of a button and flips and locks in the deployed position with ease. Mounts quickly and easily with the included thumb screw. Accepts all standard AR sight posts and hardware (included). Features of these sights include: a rugged but lightweight design with a steel base, a quick release thumb screw, and aluminum stem. Locks in the deployed position with ease and takes up very little space on the upper receiver. Weight: 6 Oz. Mounts to any picatinny rail. Designed to co-witness with the standard M16-M4 front sight and all of their front sights. Features : Steel Base with Quick Release Thumb Screw Co-Witness with Standard Height M4/M16/AR15 Front Sight Positive Lock in the Deployed Position Push Button Release Folds Flat for Use of an Optic Attaches to Picatinny Rail Weight: 6 oz Black Finish