Suggestion for Devices: Satchel Charge
Technically yes, but I still wouldn't want to hold onto a grenade with the pin out in case I accidentally dropped it. Remember, once the pin is out mister grenade is not your friend.
Sounds like an improvement over the Time Bomb, but let's be honest here, "Leave Burning C*** On Porch" would be an improvement over Time Bomb.
8 seconds.
Now, I've never been in the military (unless you count JROTC), and I've never used a grenade, but I sure as hell don't think I'd want to hold on to the thing for 8seconds.