NEW improved design. **** Patent Pending **** Safely Store your firearm. The AR is an awesome system, when whole. Once separated the internals are exposed for compromise. The Stow Safe cover system limits the debris from jamming up the works. Also adds a level of complexity to reassembly for safer storage and transport of your firearm. Kit contains 1 transport cover for a Upper Receiver. 2 retaining pins. Upper Receiver Cover - Prevents debris from collecting in the bolt carrier area when in transport/storage/use while separated or not connected to the Lower Receiver. Attaches in place using two pins. Note: this is not a water tight seal. Helps keeps sand, rocks and lint out of your receiver/magazine. Note to Etsy Policy reviewers: This is a storage devise, not a functional/enhancement accessory. Note: The Upper Receiver assembly is shown for fitment reference, and is not included in this listing. Patent Pending - Designed and made in the USA