GEISSELE Super Modular AR15 9.3in MK4 Black Rail (MK4-95-BLK)

Full-length M1913 picatinny top railM-LOK slots on five sidesIncludes Geissele .750" Super Gas BlockIncludes Barrel NutDurable Hardcoat Anodized FinishSand Color

MK4 with Magpul M-LOK attachment systemPicatinny rails sections at 3, 6, and 9 o'clockErgonomicFree FloatingModularLightweight, Strong and Rigid The GEISS

MK4 with Magpul M-LOK attachment systemPicatinny rails sections at 3, 6, and 9 o'clockProprietary 2.25" long barrel nutLightweight, strong and rigidBlack Finish

MK8 with Magpul M-LOK attachment systemM-LOK Compatible rails sections at 3, 6, and 9 o'clockErgonomicFree FloatingModularLightweight, Strong and Rigid The

MK8 with Magpul M-LOK attachment systemM-LOK Compatible rails sections at 3, 6, and 9 o'clockErgonomicFree FloatingModularLightweight, Strong and Rigid The