Geissele Automatics MK8, Super Modular Rail, Handguard, 10.5, M-LOK, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included, Black 05-1657B Versatile and innovative" Geissele's MK8 DDC Super Modular Rail is a perfect addition to any AR-platform. It features M-LOK attachment points in the 3" 6" and 9 o'clock positions as well as in the upper 45 degree quadrants" giving the user virtually unlimited customization options in terms of tactical lights" lasers" fore-grips" and other M-LOK accessories.