The Folding Front Sight Base from KAC is available in a pinned configuration only, which make sense as drilling and pinning a FSB to the barrel is a stout way to keep it locked into place.

for front sight mounting, the band clamp can be expanded and slid between the magazine tube and the barrel (extended mag tubes) and then clamped back into place 6) a sight will soon be available ...

The next component to be attached to the barrel is the rear sight base. It rests against the front trunnion, so the alignment must be carefully checked before and during the process of pressing it ...

for front sight mounting, the band clamp can be expanded and slid between the magazine tube and the barrel (extended mag tubes) and then clamped back into place 6) a sight will soon be available ...