I think you should make atleast a indicator when the grenade is loaded.
Like for example,
smoke should come out untill the grenade is loaded.
Out of the grenade shooting barrel.
Off topic:
Amande's grenade is a bit like the HE.
When I learn how to make add-ons, or if I find a person to make them for me,
ask him/her to make a MP40 Submachinegun.