hmmm...
i have a S&W M&P 15 OR Rifle as well.
the gas block of this model comes with a picatinny rail top.
i was assuming there are rifle-length rails out there that work around the gas block (i.e. the Troy BattleRail 12" MRF-CX) without any modification of said gas block required.
is that a false assumption? does anyone know? would greatly appreciate some advice as well. Thanks in advance