The Nail Grenade first appears in Modern Combat 5: Blackout, and is a powerful grenade with a fairly large blast radius. The nail grenade will not kill but will take enemies within a 7M radius down to 5-20HP. As such, it tends to be less popular than Frag or Concussion grenades due to being unable to instantly kill an enemy directly in the blast center.
Largest radius of all hand grenades
Unable to instantly kill enemies directly in the blast center