UTG Pro AR-15 Extended Carbine Length Drop-in Quad Rail Picatinny Black. The UTG Pro Quad Rail System by Leapers comes with an aircraft aluminum extrusion with integral spinal cords for alignment. The Carbine Length Quad Rail System UTG Pro by Leapers has Picatinny rails with 19 top slots 23 bottom slots 25 left/right slots. This UTG Pro Rifle Scope Mount has simple installation no gun-smithing or special tools required. We are proud to offer a full range of UTG Pro products and Rifle Scope Mounts for purchase in our online store. Specifications for UTG Pro AR15 Extended Carbine Length Drop-in Quad Rail: Manufacturer: UTG Pro Color: Black Finish: Matte Fabric/Material: Aircraft Grade Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Drop-In Handguard Style: Quad Rail Gun Rail: Picatinny Included Accessories: Standard Quantity: 1 Features of UTG Pro 4/15 Carbine UTG Pro Quad Rail System w/ Front Extension: with Ultimate Precision and Strength Fits Model 4/15 Carbines with Rails Extending Beyond Front Sight Aircraft Aluminum Extrusion with Integral Spinal Cords for Alignment Picatinny Rails with 19 Top Slots 23 Bottom Slots 25 Left/Right Slots Simple Installation No Gunsmith or Tool Required Solid Locking Feature for Secure Fit and Zero Retention 18 UTG Rubber Rail Guards Included Package Contents: UTG Pro AR15 Extended Carbine Length Drop-in Quad Rail UTG Pro MTU015: AR-15 Extended Carbine Length Drop-in Quad Rail Picatinny Black