Mount this adapter to an existing rifle swivel stud and gain a Picatinny rail section for mounting accessories… all without losing your front swivel stud! • Constructed of rugged 6061 T6 aluminum with Type-III hard-coat anodized finish• Provides Picatinny rail section for rail-mounted accessories• Contains side swivel stud for continued use of sling• Mounts to existing rifle swivel stud