The SME Spring Bipod Sling Swivel Stud Mount uses a clamp mount method to easily attach to firearms with picatinny/weave style grooves. The butt stud adapter attaches to firearms with a stand butt stud and additional butt stud adapter allows for swivel attachment. The Swivel Stud legs are adjustable, spring-loaded, and facilitate rapid deployment. The legs are also round column foldable and extendable for adjustable shooting positions. Simply pull to extend the leg in position, and press the button to retract the legs. This Spring Bipod Sling Swivel is perfect for the professional or target shooter alike. FeaturesPremium 6061-T6 AluminumAnodized Black Finish6.5" to 8" AdjustabilityFound Foldable Column Legs