Includes: Riser Mount, Allen wrench Materials: 6061 Aircraft Grade Aluminum Compatibility: Picatinny Rails Length: 14 Slot: Base: 2.5 in; Rail: 5.50 in Height: High profile mount provides 0.88 inches of rise. Low profile mount provides 0.38 inches of rise. Width: 1.25 in Color: Black Warranty: Lifetime The Monstrum Shrapnel Offset Riser mount offers the same rock solid performance as the rest of our riser mount line, but with 2.5 inches of forward extension for more flexible optic placement and eye relief positioning. The picatinny base measures 2.5 inches (or 5 picatinny slots) in length while the top rail measures 5.5 inches (14 total picatinny slots). The rail extends an extra 2.5 inches over the front of the base, allowing for more forward positioning of long eye relief optics.