Receiver extension and a method of manufacturing it

Abstract

A method for manufacturing is disclosed. The method forms a hollow pipe using an extrusion process, the hollow pipe contains a main body, a through aperture, and a protrusions running along the entire length of the main body, forms internal threads inside the through aperture, forms an elongated bottom member from the protrusion, wherein the elongated bottom member contains a recessed channel and one or more recesses, wherein the elongated bottom member runs along a portion of the main body, forms external threads along the main body.

1 . (canceled) 
     
     
         2 . A method comprising:
 providing a hollow metal pipe;   the non-metallic sleeve comprises an elongated bottom member, wherein the elongated bottom member comprises a recessed channel and one or more recesses.   
     
     
         3 . The method of  claim 2  further comprises forming external threads on an outer surface of the hollow metal pipe.