Battle Arms Development Workhorse AR15/M4/AR9 9.5in Free Float Rail M-LOK Handguard Black. With M-LOK mounting options at the 3.6 and 9 o'clock positions and skeletonized areas where M-LOK is not used this handguard not only offers function but shaves weight where it is not needed. We still maintain 1913 MIL-SPEC Picatinny rail at the 12 o'clock position that we "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 Workhorse AR15/M4/AR9 9.5in Free Float Rail M-LOK Handguard: Manufacturer: Battle Arms Development Color: Black Finish: Type 3 Black Hardcoat Anodize Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-9 M4 AR-15 Gun Type: Rifle Handguard Length: 9.5 in Handguard Type: Free-Float Gun Rail: M-LOK Gas System Length: Carbine Length Weight: 7.83 oz Inner Diameter: 1.36 in Gas System Type: Direct Impingement Package Contents: Battle Arms Development Workhorse AR15/M4/AR9 9.5in Free Float Rail M-LOK Handguard Battle Arms Development BAD-WH9.5-MLOK: Workhorse AR15/M4/AR9 9.5in Free Float Rail M-LOK Handguard Black