Fortis Manufacturing's AR-15 LA Stock-Bundle Pack is an all-aluminum Lever Action (LA) stock that utilizes mil-spec buffer tubes. That's right - slip off the plastic stock and upgrade your rifle immediately. The lever action is what clamps down onto the buffer tube so there's no rattle or movement and their patent pending design is one of a kind. The real carbon fiber cheek piece adds to the overall aesthetics of the LA stock.