Rebuild your Riflespeed Gas Control with this OEM Rebuild Kit. Includes Plunger in your choice of sizes (see below), 17-7 stainless steel Wave Spring, Gas Tube Roll Pin, Barrel Cross Pin, and two Set Screws. Rebuild is recommended when replacing barrels or between 10,000 and 25,000 rounds, depending on your firing schedule. Sizes are based on the Plunger size included with each kit. Measure the plunger that is being replaced or refer to the Common Configurations and Settings chart on the Technical Documents page linked below to determine the correct size for your application.