Forward Controls Design ESF End Plate, Sling Adapter The Forward Controls Design ESF End Plate, Sling Adapter is a rugged, purpose-built upgrade that transforms an often-overlooked component into a true functional enhancement. Precision made from heavy-duty 4140 chrome moly steel and finished in a tough Cerakote, the ESF is built to withstand hard use while maintaining a clean, low-profile design. It features three integrated QD sling sockets: rotation-limited sockets on each side to prevent sling twist, and a centrally located rear socket with free rotation for smooth shoulder-to-shoulder transitions. Weighing a solid 1.1 oz and engineered to allow full stock collapse-even with a rear-facing QD installed-the ESF reflects Forward Controls Design's commitment to simplicity, durability, and real-world performance.