The Strike FSA Dual a modular folding arm solution that can fold to the left and the right with interchangeable stock and stabilizer end pieces. While the new Stock Single Folder still utilizes the same arm and stock end piece as our Dual Folder it has a strengthened hinge made of steel instead of aluminum making it extremely robust. The fitment is also perfect with little to no play when extended and folded. This folder only folds to a single side but can do so at any time without reconfiguring or using a button. At the 3 and 9 o’clock positions there are two QD points located on the stock end piece for attaching your favorite sling. The Strike Single Folding Adapter is compatible with any weapon platform that has a rear-facing 1913 Picatinny rail. To attach tighten the hex screw in the hinge adapter onto a pic rail. Includes: x1 Strike Folding Stock x1 Torx tool x1 Warning Card