This Adapter makes mounting the Harris Bipod to standard AR15 / M16 handguards quick & easy. The kit includes a rectangular interior plate, a rectangular exterior washer, a threaded Quick Detach stud and a QD Sling Swivel. Simple installation involves removing the lower half of the handguard and positioning the stud and smaller washer through one of the holes in the handguard, and threading it up into the inside reinforcing plate. Construction is manganese phosphated steel – made by Harris in the USA. How to Install