It may not be compatible with any re-designed, oversized upper receiver. Also, the rail system works with standard AR-15 upper receivers. The compatibility with any special piston system is not guaranteed. NOTE: This rail system is designed to fit with standard AR-15 gas tubes.

Flat Dark Earth Cerakote® Applied In-House for Superior Style and Function.Ergonomic Slim Tubular Profile for Most Positive Handling.Integral Anti-rotation Tab for Rock-solid Locking.Includes 3 User Detachable 2-slot Rail Sections for 3, 6, and 9 O’clock Positions.Super Lightweight with Rail at 12 O’clock Position Forms a Continuous Picatinny Top Section.For more information: 15″ Single Rail, Super Slim, Free-floating Handguard with Proprietary Attachment Design and Extremely Compact Profile WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Precision Machined from 6061-T6 Aluminum Black Anodize finish.Light weight with Picatinny Top Rail, Flush Fitting and Continuous with Flat Top AR15 Upper Receiver.Fits All Standard Mil-spec AR15 Upper Receiver.15″ Single Rail Super Slim Free-floating Handguard with Proprietary attachment Design.So, if you’re looking for an upgrade or replacement handguard that is slim, light, and packed with features, look no further than the Leapers UTG Pro 4/15 15″ Super Slim Free Float Handguard! Leapers Pro 15″ Handguard Black Features: The free float design and integrated anti rotation tabs on the handguard make for a rock-solid rail system. The 4/15 Rifle 15″ slim rail can be used with low profile gas blocks. You can easily customize your AR-15 Rifle with accessories with the detachable 2 slot Rail sections at the 3, 6, and 9 o’clock positions that are included. The UTG Pro Super Slim Rail will fit all Mil-Spec Upper Receivers with the included Barrel Nut in a short amount of installation time. The abundance of proprietary attachment mounting areas gives you plenty of room for mounting accessories. With its super slim design and light weight, this handguard provides superior ergonomics in a free float system. The Leapers UTG Pro 4/15 15″ Super Slim Free Float Handguard is the perfect replacement or upgrade for your AR-15/M16 handguards. Description Leapers UTG 15″ Pro 4/15 Super Slim AR-15 Handguard

Utg super slim free float handguard