The Folding Stock Adapter is designed to be compatible with various R15/10A setups. Whether youre using direct impact or piston, this AR Folding Stock Adapter will work, allowing you to build a very compact stock for storage or transport. No proprietary bolt bracket sets or buffer tubes are required, just install on your receiver and youre good to go. With just one button, you can quickly fold your inventory for storage or unfold it for shooting. The Gen 3 Folding Stock Adapter is a great option for those looking to build an AR that doesnt take up too much space in a range pack.Features: CNC machined from aluminum alloy. The low hinge doesnt get in the way when charging the R15/10A. Durable DLC finish