LaRue has developed a nifty looking AR-15 stock called the RAT Stock. It has a trigger mechanism, rather than a lever, to adjust the length of pull.
With simplicity in mind, the new LaRue RAT™ Stock was designed to be the ideal complement to the LaRue Tactical AR15 family of rifles. The unique 2-stage trigger mechanism allows shooters to adjust the pull length of the stock while in a variety of shooting positions. The CNC-machined internals allow for smooth operation as trigger mechanism is pulled to the rear and released. The internals provide positive lockup on Mil-Spec receiver extension positions. The internal cavity is designed for a snug fit without the need for an additional locking mechanism.
Ambidextrous 1/4” swivel sockets, and 1” slots provide ideal anchor points for two-point slings. A locking rear butt-plate slides open to expose compartments that hold cleaning kit components.
They are selling the stock for $115.