JINSE Bipod Picatinny Rail Foldable Adjustable 9-11 Inches Bipod Adapter High Tech Durable Aluminum Construction Center Height 9"-11" Bipod's legs fold up and retract when not in use Includes sling swivel stud adapter and Picatinny/Weaver adapter to allow it to mount Posi-Lock legs provide extremely solid, exceptionally accurate support