O2 Lite M-Lok Free Float 15.5-inch Forend The O2 Lite is engineered and designed with all new lightening cuts and scallops to reduce weight by 20% all while remaining fully functional with QD holes and M-LOK slots. Features: - Free float. Made from 6005-T651 Aluminum. - Engineered with advanced ergonomics for comfort and improved performance. Accessory rails can be placed at 3 6 and 9 o clock positions and can be joined to create continuous Pic Spec Rail. Four or more QD attachment points. Made to fit Magpul QD. - Engineered to allow for low profile gas block to fit inside. Specifications: - Inside Diameter: 1.60 - Outside Diameter: W 1.80 and H 2.16 - Weight: 7oz - Hardware weight: 2.70 oz - Color: Flat Dark Earth