GrovTec's Picatinny Stock AR Rail is precision CNC machined from lightweight, solid aluminum with Type III Black Hard Anodized finish. The MIL-STD 1913 Picatinny rail pattern allows mounting a variety of lasers, sights and scopes or other accessories. It easily accommodates different-length attachments and provides for a wide adjustment of eye relief. Included is the associated hardware for install.Precision CNC machined from lightweight, solid aluminum with Type III black anodized finish. MIL-STD 1913 Picatinny rail pattern allows mounting a variety of lasers, sights, scopes or other accessories. Features: Lifetime warranty For variety of lasers, sights, scopes