You shouldn't need tools to swap uppers. Just pull the pins out. If your wanting to sell the 20" let me know
A bit far for me. Should be someone here though that can help.clear lake, ellington field area
I am willing to drive.He plans on switching the upper receiver. Changing from a handled one to a flat top. Bit more involved than just an upper but not a bunch.
A bit far for me. Should be someone here though that can help.