This adapter allows the mounting of rail mounted bipods to sling swivel stud equipped rifles. Many modern, popular bipods are now rail mounted. The 4-½ inch long, picatinny mounted rail is precision machined from T6 Aircraft Grade Aluminum to meet MIL-STD 1913 rail specifications. No permanent modification is required and all mounting hardware is included. Works universally for rifles with sling swivel studs as well.