NEW improved design. **** Patent Pending **** Dealer Inquiries Invited Works with hammer cocked or uncocked. Works with magazine inserted. Improved Sealing at the buffer tube. 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 Storage cover for a Upper Receiver plus two retaining pins. 1 transport cover for a Lower Receiver. 1 Mag well Caplug. 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 furnished two pins. Lower Cover - Prevents debris from collecting in the trigger hammer and buffer tube areas when in transport/storage while separated from the Upper Receiver. Attaches in place using the receiver's existing pins. Magwell Caplug - Prevents debris from collecting in Lower mag well area when in transport/storage while separated or connected to the Upper receiver. Attaches in place using the mag release. Ejects and drops like a standard magazine. Also Caps the mag well for single shot conversions. Note: this is not a water tight seal. Helps keeps sand, rocks and lint out of your receiver/magazine. Note Policy reviewers: This is a storage devise, not a functional/enhancement accessory. Note: The Upper and Lower Receiver assemblies are shown for fitment reference, and are not included in this listing. Designed and made in the USA Patent Pending The Armourer's Tool Box