The Midwest Industries Handguard features a rugged construction of 6061 aluminum, hard coat anodized for a lifetime of service. Easy drop-in design does not permanently alter the firearm. FeaturesInstalls in minutes with minor fittingFeatures two anti-rotation QD sling swivel socketsCompatible with railed gas tubes like ULTIMAKThree sides of usable M-LOK slotsExtremely solid lock upConstructed from 6061 aluminum922R Compliant