What we have here, is one dark gray slab side sp1 upper receiver that has the usual use and handling marks. Perfect operational condition. Has no sight or dusk cover, and PO drilled a hole in the handle for whatever reason, but doesn't look too bad (see photo). It is a large pin, but I was using an adaptor bushing (included) and it is forge marked with CK under the sight base. I am also including a used four-position collapsable stock with buffer (no spring).
What I am looking for:
-RRA two-stage trigger
-bolt and carrier assy
-A1 20" pencil barrel assy
Please email me at firstname.lastname@example.org, or IM me here if interested.http://eo.yifan.net/users/p/mgoldsberry/slicksideupper.JPG