The Rapid Attach Buttstock Adapter Mini 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. The RAB-AD Pic Rail is designed for firearms utilizingMIL-STD-1913 (Picatinny rail) railed receivers. RAB-AD Mini Features: Designed, machined, and assembled in the U.S.A 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: The RAB-AD Mini is compatible with RAB-AD Pic Rail to adapt buffer tube style stock to railed receiver. It is not compatible with standard AR15 rifles as it cannot retain the buffer weight and spring. *Armorers tools provided. Only 3/8 ratchet wrench required* RAB-AD Pic Rail Features: Designed, machined, and assembled in the U.S.A 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 3.7 ounces Adds 1.46 inches to length of pull NOTE: Compatible with RAB-AD MINI to adapt railed receiver to buffer tube style stock *Hex keys provided. RAB-AD MINI (MALE ASSEMBLY): Designed, machined, and assembled in the U.S.A 7075 aluminum body Hard coat anodized for maximum wear protection 3 steel ball detents and locking bolt for a secure lock up RAB-AD MALE ASSEMBLY weighs 1.4 ounces NOTE: The RAB-AD Mini MALE Assembly is compatible with the RAB-AD MINI Female assembly RAB-AD Pic Rail Female Assembly to adapt buffer tube style stock to railed receiver. It is not compatible with standard AR15 rifles as it cannot retain the buffer weight and spring. *Armorers tools provided. Only 3/8 ratchet wrench required*