The KAC Knight Armament Set Rail Covers 4-11 Rib W/ Case is a set of low profile rail covers designed for rifles. Made of black polymer, these covers are sourced from the United States and are compatible with a universal range of guns. The set includes 4-11 rib covers and comes with a case for easy storage and transport. The Knight brand is known for producing high-quality gun parts, making this set a reliable choice for hunters and sportsmen looking to enhance their rifle's performance.