US Patent 11385019 Double walled handguard for firearm

A double-walled handguard for a firearm includes an inner tube and an outer tube connected by longitudinally-extending struts. A circumferential gap is formed between the inner and outer tubes. The handguard can be extruded as a blank and feature such as accessory rails and accessory mounting apertures can be machined into the blank to arrive at the desired configuration. Vent holes may be machined into the outer tube to provide a venting path for hot air in the circumferential gap. The double-walled handguard is expected to have increased strength compared to a single-walled handguard and better shield the user's hands from heat generated by the barrel of the firearm.