The Stern Defense RAB-AD Mini Rapid Attach Buttstock Adapter 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 tab and 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 Mini both robust and lightweight. The RAB-AD Mini's designed for firearms utilizing AR style buffer tube stocks that do not require retention of a buffer weight and spring. Features 7075 aluminum body Hard coat anodized for maximum wear protection 3 steel ball detents and locking bolt for a secure lock up RAB-AD weighs 2ounces Adds 1.25 inches to length of pull NOTE...