Description
This is for the installation of your new USGI FSB on your new or used barrel. We do NOT install or reinstall pre drilled FSBs. We do not install FSBs on .308/7.62 barrels.
FSBs will be installed to Mil spec Mil-C-70599A section 3.4.6
Do NOT send a complete upper without ordering the disassemble – reassemble services.
“The normal rear sight peep (sight rotated fully rearward) shall be used with the rear sight set centrally in the slot for windage within plus or minus five (5) clicks.”
