Black Rain Ordnance Upgrade Kit 1 AR-15 Buttstocks Flat Dark Earth. Includes a Magpul UBR stock and Magpul MOE grip. A 12 inch hybrid MLOK rail is Cerakoted FDE and includes mounting hardware. Also includes a .750 adjustable gas block and a 5.56 precision hex compensator with crush washer. Specifications for Black Rain Ordnance Upgrade Kit 1 AR-15 Buttstocks: Manufacturer: Black Rain Ordnance Color: Flat Dark Earth Gun Model: AR-15 Gun Type: Rifle Features of Black Rain Ordnance FDE Upgrade: FDE Magpul UBR stock FDE Magpul MOE grip Cerakote FDE 12" hybrid MLOK rail w/ mounting hardware .750 adustable gas glock 5.56 precision hex compensator w/ crush washer Package Contents: Black Rain Ordnance Upgrade Kit 1 AR-15 Buttstocks What firearm models does the manufacturer say Black Rain Ordnance Upgrade Kit 1 AR-15 Buttstocks is compatible with? The manufacturer suggests that Black Rain Ordnance Upgrade Kit 1 AR-15 Buttstocks is compatible with AR-15Black Rain Ordnance BRO-FDEUK1: Upgrade Kit 1 AR-15 Buttstocks Flat Dark Earth