In collaboration with John Hallis of North Freedom Engineering, ARS presents the highest quality buttstock tool available. Heat treated 4140 steel with a generously sized T- handle and nicely rounded shaft to comfortably fit in the hand. Rod is an M16 cleaning rod threaded #8-36 and will accept a variety of USGI cleaning brushes for the gas tube and return spring tube. Rod can be removed for using tool on grip nut. Included patch eyelet’s rounded profile won’t snag on the inner return spring.