Carlson's Snap Caps allow for the SAFE release of firing pin springs. A spring loaded striking area cushions and protects firing pins, so these Carlson's choke tubes are a safe way to practice without risking damage to firing pin springs or firing pins themselves. The Carlson's Snap Cap works for both handguns and rifles, and they have an aluminum body with a steel striker. These Carlson's weapon accessories are great for educating your shooting students without damage to the firing pin spring, and they allow you to practice without firing a real cartridge. Due to this, Carlson's Snap Caps are ideal for guns used in rapid fire. The striking area is spring loaded, so using the Carlson's Choke Tube Snap Caps means you waste less propellant and more time sighting in your firearm of choice.