Shop › ARMASPEC M-LOK TO ARCA RAIL 12" BLK ARMASPEC M-LOK TO ARCA RAIL 12" BLK $59.39 Armaspec Arca Rail, Fits M-LOK, 12", Anodized Finish, Black ARM621-12 Quantity: Add To Cart Added! Armaspec Arca Rail, Fits M-LOK, 12", Anodized Finish, Black ARM621-12