Hi-Tech's KSG Billet Mini Side Rail & Mounting Hardware Attaches right to sling Loop with flush mounting screws. ** No sticking out screws & slim custom design specifically for the KSG** This rail was specifically designed and manufactured for the KSG. CNC Machined from lightweight Aircraft Billet Aluminum. Keeps the weight down on the front this way. Length: 3.200". Ergonomic design with smooth edges and slim design. Flat Bead Blasted & Black Hard Anodized to Military spec MIL-A-8625 Type III Class 2 for Steel like Strength without the weight This item is copyrighted & "Design Patent Pending", 8/21/14. Thank you.