UTG PRO Made in USA Model 500 Shotgun Picatinny Rail Mount Proudly designed and made in USA, precision Machined from aircraft grade aluminum alloy with hard Anodizing with matte black finish Unique contoured bottom designed to fits on Mossberg MTU029SG 500 Pre-drilled shotgun receiver 5.5 inch overall length with 13 Picatinny rail slots for optimal placement of scope, dot sight or iron sight, and flexible eye relief adjustment Low profile with see thru design for Use of front bead sight Includes assembly screws and tools for simple and friendly installation, no gunsmith required