The UTG Pro Arwen M-LOK Free Float Handguards is the perfect way to make sure that your hands are free of fatigue. This Handguard from UTG Pro is built with an octagonal profile that has been ergonomically designed to be free of strain and fatigue, so you can spend more time shooting and less time reinstalling the Handguard. The UTG Pro Arwen M-LOK Free Float Handguard features a patent-pending steel barrel nut that requires no timing of the gas tube or its installation screws. This UTG Pro Rifle Handguard is compatible with left or right handed upper receivers and is compatible with standard Mil-spec. Forged upper receivers are not guaranteed to be compatible with billet upper receivers. Also, the UTG Pro Arwen M-LOK Free Float Handguard features integral anti-rotation tabs that aligns upper receiver and prevents handguard rotation and flex. The UTG Pro Arwen M-LOK Free Float Handguards is made with a patent-pending steel barrel nut that requires no timing of the gas tube or its installation screws. Specifications for UTG Pro Arwen M-LOK Free Float Handguards: Manufacturer: UTG Pro Color: Black Finish: Hard Coat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Attachment/Mount Type: M-LOK Gun Rail: Picatinny Condition: New Included Accessories: Standard Country of Origin: USA Quantity: 1 Features of UTG Pro Arwen M-LOK Free Float Handguards Precision Machined from 6061-T6 Aluminum and finished in a Matte Black Hard Coat Anodization Features 30/15/24/6 M-LOK Slots Across 3 Slot Tracks for Mounting Accessories with an Additional 4 Slots at the Front Along the 45 Degree Tracks 43/24/38/11/21 Slot Full-length Top Picatinny Rail Flush and Continuous with Upper Receiver Ergonomic Octagonal Profile with Thoroughly Machined Lightening Cuts Integral Anti-rotation Tabs Accurately Aligns Upper Receiver and Prevents Handguard Rotation and Flex Patent-pending Steel Barrel Nut Requires no Timing of the Gas Tube or its Installation Screws Compatible with Left or Right Handed Mil-spec Upper Receivers Compatible with Standard Mil-spec. Forged AR15 Upper Receivers, Compatibility with Billet Upper Receivers is Not Guaranteed, Barrel Nut Fits Over Barrel Diameters up to 1.05in Actual Length from Flush with Receiver to Furthest End of Handguard, 17.25/9.75/15.25/4.75/13.75in Package Contents: UTG Pro Arwen M-LOK Free Float Handguards