NcSTAR Bipod, Spring Loaded Folding Action, Friction Lock Legs, 3 Adapters Included (AR-15 GI Handguard, Universal Barrel Mount, Weaver/Picatinny Type Rail with Sling Stud), Fits Most Rifles with Swivel Stud, 5.5-8, Black ABPGC This compact size precision grade bipod with smooth tension legs mounts directly onto most sling swivel studs. It includes three adapters for flexible installation including an AR-15 GI handguard adapter" universal rifle barrel mount adapter and a Weaver/Picatinny type rail adapter with sling stud. It features a durable aluminum and steel construction" and is height adjustable from 5.5" to 8".