What is the recommended delay for the M-67 Fragmentation Grenade before explosion?

The recommended delay for the M-67 Fragmentation Grenade is typically around 3-5 seconds before detonation. This time frame is crucial as it provides the thrower a safe amount of time to take cover after throwing the grenade while ensuring that it explodes shortly after hitting the target area. This delay also minimizes the chance of the grenade being thrown back by an enemy or being found and mishandled after being thrown. The timing is designed to optimize the effectiveness of the grenade while prioritizing safety for the user and their teammates. Understanding this delay is critical for proper engagement tactics during combat scenarios, as it impacts the effectiveness of the grenade's fragmentation pattern and enhances the element of surprise against adversaries.