ODIN FOREND O2 LITE MLOK 15.5" BLACK AR-15ODIN FOREND O2 LITE MLOK 15. 5" BLACK AR 15 FEATURES 15. 5" M LOK O2 Lite Free Float Forend Made from 6005 T651 aluminum Hard anodized for durability Inside Diameter: 1. 6" Outside Diameter: 1. 8"W x 2. 16"H The O2 lite is a full 20% lighter than its predecessors Engineered with advanced ergonomics for comfort & improved performance Accessory rails can be placed at 3, 6, & 9 o'clock positions & can be joined to create continuous Pic Spec Rail Four or