Description: NcStar Precision Grade Bipod (Full Size) Specifications: Brought to you by Popular Demand, introducing the NcSTAR Precision Grade Bipods Bipods attach to virtually any Sling Swivel Studded Firearm in Seconds Aircraft Grade Aluminum and Steel Construction make these bipods Extremely Durable yet very Light Weight Spring Loaded Folding Action give the bipod legs maximum tension in any position Spring Loaded legs also Retract instantly with a push of a button Get the Accuracy you need with the NcSTAR Precision Grade Bipods BONUS! Includes 3 Adaptors: AR-15 Hand Guard Sling Stud , Universal Barrel Mount, and Picatinny Rail Sling Stud Compact Model with an Adjustable Height of 5.5 to 8 inches