Bootleg Inc AR-15 M-LOK Handguards CamLok Quick Mount 4in Black. These handguards are extruded 6061 Aluminum and feature a Mil-Spec Hard Coat Anodizing. The simple CamLok system ensures that the handguard can be installed quickly and stays put. Quick mount. Specifications for Bootleg Inc AR-15 M-LOK Handguards: Manufacturer: Bootleg Inc Color: Black Finish: Type II Anodizing Fabric/Material: 6061 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: M-LOK Condition: New Inner Diameter: 1.375 in Outer Diameter: 1.575 in Mount Type: M-LOK Quantity: 1 Package Contents: Bootleg Inc AR-15 M-LOK Handguards Bootleg Inc BP-HG4-4: AR-15 M-LOK Handguards CamLok Quick Mount 4in Black