Battle Arms Development Workhorse 13 M-LOK Rail Black Hardcoat. With MLOK mounting options at the 36 and 9 o'clock positions and skeletonized areas where MLOK is not used this handguard not only offers function but shaves weight where it is not needed. They still maintain 1913 MIL-SPEC Picatinny rail at the 12 o'clock position that is "notch cut" to match their upper receiver and reduce weight again. Offered in multiple lengths to accommodate different barrel lengths and different needs the WORKHORSE offers everything you need and nothing you don't. Specifications for Battle Arms Development BAD-WH13-MLOK Workhorse 13" M-LOK Rail Black Hardcoat A: Manufacturer: Battle Arms Development Color: Black Finish: Black Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Gun Type: Rifle Handguard Length: 13 in Gun Rail: M-LOK Included Accessories: Standard Quantity: 1 Battle Arms Development BAD-WH13-MLOK Workhorse 13" M-LOK Rail Black Hardcoat