UTG Pro AR15 Mid Length 9in Super Slim Free Float Handguard Black. The compatibility with any special piston system is not guaranteed. Also the rail system works with standard AR15 upper receivers. It may not be compatible with any re-designed oversized upper receiver. Specifications for UTG Pro AR15 Mid Length 9in Super Slim Free Float Handguard: Manufacturer: UTG Pro Color: Black Finish: Matte Fabric/Material: Aircraft Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Length: 9 in Handguard Type: Free-Float Gun Rail: Picatinny Condition: New Included Accessories: Standard Quantity: 1 Features of UTG Pro AR-15 Handguard: 9" Single Rail Super Slim Free-floating Handguard with Proprietary Attachment Design and Extremely Compact Profile Super Lightweight with Rail at 12 Oclock Position Forms a Continuous Picatinny Top Section Includes 3 User Detachable 2-slot Rail Sections for 3 6 and 9 Oclock Positions Integral Anti-rotation Tab for Rock-solid Locking Accommodates Low-profile Gas Block Ergonomic Slim Tubular Profile for Most Positive Handling Compatible with Picatinny and Weaver rails Package Contents: UTG Pro AR15 Mid Length 9in Super Slim Free Float Handguard UTG Pro MTU004SS: UTG PRO AR15 Mid Length 9" Super Slim Free Float Handguard