>>63857798
>kind if required to get the flip up sight, yeah?
not necessarily, mine has the peq 2 top rail instead of the full picatinny. Depending on tube length you can put a standard buis if the gas block is covered, unless you specifically are going for the MK12 in which case yes get the flip-up gas block

>>63852046
got rid of mine and the screws started stripping