Black Rain Ordnance Slim Handguard 5.56 FDE. These AR Handguards & Forends by Black Rain Ordnance fit most low-profile gas blocks and are completely M-LOK compatible for all your favorite accessories. For a slim yet durable handguard choose the BRO AR15 Handguard Specifications for Black Rain Ordnance Slim Handguard: Manufacturer: Black Rain Ordnance Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gun Rail: M-LOK Condition: New Additional Features: Slim Includes SLM Barrel Nut And T-15 TORX Mounting Screws Included Accessories: Standard Quantity: 1 Features of Black Rain Ordnance M-LOK Handguard 2RO-HZ-BRO-SLM: Super slim profile Black anodize finish 1.35in inside diameter Magpul M-LOK compatible 3 quick detach accessory points Package Contents: Black Rain Ordnance Slim Handguard 2RO-HZ-BRO-SLM Barrel Nut T-15 Torx Mounting Screws Black Rain Ordnance BRO-SLM-1776-FDE: 17.76in Slim Handguard FDE