OP - I did remove both the front and rear sight on my Zastava - is marked on right side of barrel as LK M70 - but might not be the same as yours - it had two metric screws plus some sort of "glue" - not solder - holding my rear barrel sight in place. The front sight was not removed on purpose - I got sloppy for support - trying to tap out the front sight insert to install a fiber optic insert - from that dovetail - the whole front sight ramp came off - was a "top hat" shaped piece, mounted in very shallow dovetail, that the one screw under that front sight insert went into - and more "glue" between that ramp and the barrel. This rifle was bought new from store by me - August 2013.
I did drill and tap into rear of the rear scope base, and installed one of those old Redfield "flip up" aperture sights - why I wanted a front sight on barrel, but no rear sight on barrel. The rifle is chambered for 458 Win Mag - so if I can get that aperture "sighted in" perhaps 75 meters, will be fine.