BCM RAIL PICATINNY FREE FLOAT7" BLACK FITS AR-15FEATURES-7" Rail-Free float handguard eliminates loads from barrel, reducing the deflection for more accurate shooting-Precision Machined 6061-T6 Aluminum Alloy, for high strength & lightweight-Proprietary engineered profile offers additional cross sectional strength-Steel barrel nut, to resist movement under heat-Hard coat anodized -Handguard alone weighs 6.9 oz-Includes 4 QD sling swivel sockets-1.3" Inside diamter-2.12" wide