Steel Bipod/Sling Stud screws directly into underside of handguard to provide a rock-solid mounting point for a Harris-style bipod. Also serves as an ultra-secure, heavy-duty sling swivel mount. Mfg: Yankee Hill Machine Co., Inc. SPECS: 12L14 steel, black. Approximately 5/8" (15mm) OAL, threaded portion A 1/4" (6mm) long. 10-32 thread. Fits Yankee Hill Customizable series free-float handguards only.