Functioning just like the M1 Buddy, our Carbine Buddy receiver port holds the bolt in place while allowing use of a chamber brush. The stainless steel handle of the Carbine Buddy allows for easy installation and removal from the receiver. Built to last a lifetime. Works with all USGI and commercial manufactured M1 Carbines chamber in the .30 carbine cartridge, and Ruger Mini 14 rifles. It comes with our M1 Carbine chamber brush handle, and two Dewey “Copper Eliminator” brushes. Note: The picture shows a Dewey chamber brush being used.