The Rapid Attach Buttstock Adapter for Pic Rail allows you to greatly reduce the length of your firearm for compact storage and easy transportation without any modifications. It allows for the attachment and removal of your buttstock or pistol brace in seconds. How to use: To detach, pull the bottom release taband twist counter-clockwise 30 degrees. The stock will then be separated from the firearm. To re-attach, align the two pieces, push in and turn clockwise 30 degrees. The steel locking mechanism automatically secures the adapter. It's7075 aluminum construction and steel internals make the RAB-AD Pic Rail both robust and lightweight. The RAB-AD Pic Rail is designed for firearms utilizing MIL-STD-1913 (Picatinny rail) railed receivers.NOTE: Compatible with RAB-AD MINI to adapt railed receiver to buffer tube style stock *Hex keys provided.