High Impact Plastic. Bright yellow shows in ejection port and muzzle. Allows use of service weapon. Designed for use in realistic scenarios. 5.11 Tactical Series understands the need for all members of Law Enforcement to have high quality and safe training opportunities. We recognize the importance of using service weapons when involved in realistic training scenarios and have partnered with Blade-Tec to provide a safe solution. Our Training Barrels easily replace factory barrel with a bright yellow, high impact plastic insert that guarantees everyone around you knows your handgun is safe. You can now train in realistic scenarios and defensive tactics with your own gun and be comfortable knowing that you are no threat to your partners. This training barrels allows you to cycle your handgun and pull the trigger in complete safety.