Your weapon was made by the lowest bidder. If you don't remember, it's pointed at you. All five-second grenade fuses are three seconds. The enemy diversion you are ignoring is the main attack. If you're short of everything except the enemy, you're in combat.
Incoming fire has the right of way.
No combat-ready unit has ever passed inspection. No inspection-ready unit has ever passed combat. Teamwork is essential. It gives them other people to shoot at. If the enemy is in range, so are you.