Using the Snowy Mountain Rifle Company Orberndorf AL Flex Bottom Metal body, you can change from BDL to Magazine fed anytime in minutes. It is revolutionary and the first of its kind in many ways. It is The only all-aluminum ultra-lightweight magazine system that allows you to make your BDL rifle a magazine-fed rifle while only weighing 5.4 oz. The kit uses the same Bottom Metal body, a BDL configured body with proprietary cuts, and a tensioning system to allow the all-aluminum magazine to fit snugly or remove the magazine and tensioner and attach the lid converting it back into a BDL. Each magazine kit includes an aluminum bottom metal body, one aluminum magazine, and a BDL lid.