This 11.2 inch Z rail allows shooter to mount optics / holo sight above and mount light or laser in the forward position- preserving forend space and keeping a slimmer profile than forend mounting options.  See-through design allows shooter to view iron sights through the rail.  Made of tough matte black alloyed aluminum weighing in at 8.3 ounces. Excellent value. In stock and ready to ship.