$275.00
Geissele Automatics MK4, Super Modular Rail, 9.5", MLOK, Black, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included 05-283B
$325.00
Geissele Automatics MK4, Super Modular Rail, 13", MLOK, Desert Dirt Color, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included 05-278S