The O2 Lite is the latest and lightest of all the ODIN Works forends. Precision machined from 6005-T651" the O2 lite is a full 20% lighter than its predecessors. All ODIN Works forends are free floating for accuracy and hard anodized for durability.Features :Free float.Weight (without hardware): 5.6ozHardware weight: 2.7ozMade from 6005-T651 Aluminum,Inside diameter: 1.6";"Outside diameter: W-1.8" H-2.16""Engineered with advanced ergonomics for comfort and improved performanceAccessory rails can be placed at 3, 6, and 9 oclock positions and can be joined to create continuous Pic Spec RailFour or more QD attachment points, made to fit Magpul QDEngineered to allow for low profile gas block to fit inside.