HELPING THE OTHERS REALIZE THE ADVANTAGES OF COLT XM177E2 RETRO CARBINE

This upper receiver traces its origins again some six decades to guns Colt generated to the SCAR (Special Operations Forces Beat Assault Rifle) method in the U.S. Special Functions Command (SOCOM). It's meant to obviate the need for just a separate several-rail handguard for mounting extras, affording perfect alignment of components mounted in-line