The Raven Concealment TopStop Upper Receiver Cover is designed specifically for AR-15 and M4 type upper receivers, providing a robust solution to protect your firearm components. This cover snaps securely onto most detached upper receivers, effectively sealing them to prevent dirt and fouling from entering. The TopStop also ensures that the bolt carrier group and charging handle remain in place during transport, providing peace of mind during your tactical operations. Made from tough polymer, this accessory is built to withstand the rigors of field use while keeping your firearm in optimal condition. Intended Use: Ideal for protecting AR-15 upper receivers during transport and maintenance. Key Benefits: Prevents fouling and keeps internal components secure. Key Features: - Designed to snap on most AR-15 or M4 upper receivers - Tough polymer construction for durability - Seals upper receiver from dirt and debris - Fits only detached uppers from lower receivers Summary: Equip your AR-15 with the Raven Concealment TopStop Upper Receiver Cover to ensure your firearm remains clean and functional while on the move or in storage. A simple yet essential accessory for responsible gun owners.