At Tactical Rifle Parts we specialize in turning down bolt knobs for rifles. Whether you shoot as a hobby of a profession, we can fit your bolt with a knob that suits your needs. The added length of the bolt knob provides the shooter the ability to cycle the bolt rapidly for quick follow up shots. We can manufacture a bolt design of your choice. If your current bolt is not threaded (factory knob), we can turn it down and thread it to 5/16-24. We use several different materials and offer an assortment of designs. There is no need to ship your entire rifle, just the bolt and a description of what you want.