TACFUN TAN Front & Rear 45 Degree Rapid Transition BUIS Backup Polymer Sight High quality polymer more durable and lighter than Aluminum,Easy to install,Compatible with most Picatinny / Weaver rails Low profile 45 degree orientation, no interference with primary optics / laser sight Front sight elevation adjustable,Rear sight elevation and windage adjustable, with 1/2 MOA click value Low-profile sights extend only .2" above top rail, don't interfere with primary optics or military IR illuminator /laser sight Color: Tan