M320 and GP25 ammo

[McKinleySPB]

Is there a way to set the ammo clip for the M320 Grenade Launcher
I tried to set primary, secondary, offhand, equipment, weapon slots 3,4,5,6 and nothing affected it unless Im missing something.
If its not possible then just let me know else any help would be great, thanks.

[DidUknowiPwn]

As in how much ammo is left? Or how many rounds there is in the clip? (Like 30 and you want to change it to 500000000)

[McKinleySPB]

int weap = GetWeapon("iw5_ak47_mp_camo11_mp_gp25");
how add ammo to gp25?

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in gp25 0 ammo

[archit]

All the ammo properties exist in ClientInfo.Other