The KynSHOT Spacer Weight as designed in cooperation with Blitzkrieg Components, LLC., can be used with KynSHOT's PCC hydraulic buffers, and in certain cases, KynSHOT AR hydraulic buffers to add mass in front of the buffer. The Spacer Weight also adds .75" in length to the buffer system, and adds 2.5 ounces of weight, which is designed for a close fit buffer tube while preventing tilting of the buffer during cycling.FeaturesDelays initial bold movementSlows bolt velocity Helps keep the buffer aligned in the buffer tubeCan be used to make a short stroke system