VISM M-LOK Handguard for AR-15/M4 Black Carbine Length. Remove factory handguard drop in the M-LOK handguards and use supplied screws to secure M-LOK handguard in place. US Patent Pending Specifications for VISM M-LOK Handguard for AR-15/M4: Manufacturer: VISM Color: Black Fabric/Material: Anodized Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gun Rail: Picatinny Condition: New Included Accessories: Standard Mount Type: M-LOK Quantity: 1 Package Contents: VISM M-LOK Handguard for AR-15/M4 VISM VMARMLC: M-LOK Handguard for AR-15/M4 Black Carbine Length