Precision casted and machined high-strength steel base. Top rail with integral shell deflector precision machined from aircraft aluminum with matte black anodizing. Full length 22 slot Picatinny rail allows for flexible optics applications, from compact to full size. Innovative shell deflector design with plenty of ventilation to protect optics and shooter. Low profile see-thru tunnel in top rail for use with iron sights. Simple installation with repeatable 4-Point rock solid locking onto the receiver. Precise alignment and great zero holding. Made in the USA. Material: Steel/Aluminum Weight: 12.1 oz Pieces: 1 Rail Type: Picatinny/Weaver No. of Rails: 1 Length: 9.06 inch Width: 2.11 inch Height: 1.72 inch