Swivel stud for the Lancer Carbon-Fiber Handguards for mounting a bi-pod or sling The swivel stud, washer and backing hardware is included The swivel stud is designed to be used with holes provided on the bottom of the handguard Sling swivel stud with backing hardware for the Lancer 5.56mm and 7.62mm handguards.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }