Playing Quick Draw McGraw can be...fatal.
A manual safety – when engaged – is designed to mechanically prevent the firearm from discharging when the trigger is pressed, either intentionally or unintentionally.
You should consider whether a manual safety on a handgun is right for you based on your experience level and intended use, keeping in mind best practices for safe firearms handling. It is possible for the trigger to be unintentionally pressed even under normal handling circumstances.
From the vendor website