Shop › GEISSELE 16" SMR MK18 MLOK ARCA DDC GEISSELE 16" SMR MK18 MLOK ARCA DDC $433.50 Geissele Automatics MK18, Super Modular Rail, ARCA-Swiss Handguard, 16", M-LOK, Fits AR-15, Anodized Finish, Desert Dirt Color 05-791S Quantity: Add To Cart Added! Geissele Automatics MK18, Super Modular Rail, ARCA-Swiss Handguard, 16", M-LOK, Fits AR-15, Anodized Finish, Desert Dirt Color 05-791S