IMI Defense M4 Double Heat Shield Polymer Hanguard Black. The ridged gripping surface and top/bottom vent holes retain the weapons authentic military look while an internal heat shield of lightweight aluminum protects your hand from barrel heat. M4 model is available with standard-issue double heat shields for extra insulation during sustained rapid or full-auto fire. All models fit AR-15/M16/M4 with the carbine-length gas system. Specifications for IMI Defense M4 Double Heat Shield Polymer Hanguard: Manufacturer: IMI Defense Finish: Matte Fabric/Material: Polymer Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gas System Length: Carbine Length Weight: 150 g Condition: New Features of IMI Defense M4 Double Heat Shield Polymer Hanguard Injection molded Made of high temperature resistant polymer compound Perfect fitment Quick easy installation no gunsmith required Provides improved thermal isolation and heat resistance Anodized aluminum Double heat shields Fits a round end cap Package Contents: IMI Defense M4 Double Heat Shield Polymer Hanguard IMI Defense IMI-ZPG01BLACK: M4 Double Heat Shield Polymer Hanguard Black