BarrelBlok™ is the ultimate tool for firearms training. When inserted, it prevents a round from being chambered, serves as a visual indicator that the firearm is safe, provides correct holster clearance height, and maintains the full mechanical functionality of the firearm. Every function, from reloads to malfunctions to trigger control, can be easily, realistically and accurately duplicated in a safe manner without any training scars being introduced! Each caliber is universal and no disassembly is required to use BarrelBlok™. Simply insert and safely train!