If I remove the carry handle to mount a scope what do I do about the front sight?
Should I mount a BUIS to replace the carry handle/rear sight?
If I remove the front sight do I need a flip up front sight?
If I remove the fsb will I need to do anything about the gas block assy. or handguards?
BTW it's a 20" HBAR with an A2 buttstock, if that makes any difference.
the front sight hold the handguard cap, usually if there's a front sight then its usually used as a gas block as well.
the rest is up to you, its your rifle and only you know what you plan on doing with it.
if you dont need a buis then dont get one.
if you dont want a front sight replace it or cut it off leaving the gas block portion
if you need a buis then put one in place of the carry handle.
do you still want to use irons with the front sight? replace it.