Rosco Manufacturing M-LOK Handguard w/Logo Black 13in. The narrow cross-section of the hand guard provides for an excellent ergonomic grip while the M-LOK mounting system provides a smooth hand-friendly surface in place of Picatinny rails. Specifications for Rosco Manufacturing M-LOK Handguard w/Logo: Manufacturer: Rosco Manufacturing Color: Black Finish: Type III Class 2 Hardcoat Anodized Fabric/Material: Aluminum Gun Rail: M-LOK Inner Diameter: 1.35 in Features of Rosco Manufacturing M-LOK Handguard w/Logo Aircraft-quality extruded aluminum Milspec Type 3 Class 2 hard black anodized rail 6061 aluminum Type 3 Class 2 hard anodized barrel nut Anti-rotation tabs align rail to upper receiver No barrel nut shims required for installation Does not contact or apply side loads to gas tube MLOK Slots on all flat sides (7) Compatible with most known low profile gas blocks Package Contents: Rosco Manufacturing M-LOK Handguard w/Logo Rosco Manufacturing ROS-HG-130-BLK-002: M-LOK Handguard w/Logo Black 13in