The MDT Howa 1500 SA Bottom Metal Pillar Kit is a precision-machined set of internal support spacers designed to be installed between the barreled action and the bottom metal on a Howa 1500 short action rifle when using an aftermarket bottom metal. Its purpose is to fill the gap and stabilize the interface between the barreled action and the bottom metal assembly to ensure consistent torque and alignment every time the screws are tightened. By doing this, the pillars help maintain reliable feeding, smooth bolt operation, and repeatable performance, especially when upgrading to detachable box metal systems such as AICS-pattern bottom metals. This kit is typically used when the rifle’s original stock does not have an internal micro-chassis, and it helps create a solid, repeatable contact surface that prevents shifting and improves overall rifle function during recoil and repeated use.