The Carbon Black rail matches Brigand Arm's existing high standard for handguard strength and heat rejection, and is capped with hard anodized aluminum rings for optimal impact resistance. It mounts on their standard ultralight barrel nut, and includes multiple M-LOK mounting slots, to accommodate any accessory. These carbon fiber parts are conditioned for stability even during barrel heat cycling, so front iron-sights and other aiming accessories remain accurate during any rate of fire. The 12″ EDGE model weighs only 6.6 oz (INCLUDING barrel nut weight). These handguards are the second lightest rails on the market – second only to Brigand’s original open-structure rails!