Shop › B5 RAIL COVER M-LOK ODG B5 RAIL COVER M-LOK ODG $17.10 B5 Systems Rail Covers, 4 Pack, Fits M-LOK Rails, Matte, Olive Drab Green RCM-1260 Quantity: Add To Cart Added! B5 Systems Rail Covers, 4 Pack, Fits M-LOK Rails, Matte, Olive Drab Green RCM-1260