Includes: Top Rail section, Bottom rail section, 4 Allen Screws, Allen wrench Materials: 6061 Aluminum Alloy Compatibility: Please note that this quad rail is designed for AR-15's with the a triangular handguard cap. If you have a round handguard cap contact us for assistance. Weight: 14 oz Length: 8.8 in Height: 2.5 in Internal Diameter: 1.7 in Color: Black Anodized Warranty: Lifetime 100% Risk Free, Lifetime Warranty Our two piece drop-in mid-length length AR-15 quad rail handguard is a quick and easy install on any carbine length AR-15 rifle platform in minutes. Crafted from aircraft grade aluminum, both sturdy and lightweight. Allows for the mounting of tactical accessories such as bipods, flashlights, and sights. Before purchasing and installation, we recommend viewing our installation guides.