Carry ammo but not fire it

[granQ 293]

Okey what i want to do is to make the "loader" be able to carry ammo for our carl gustav weapon. Before i made so if they had the AK5 they could pick up ammo but since the ammo was for a secondary weapon and the AK5 was primary it worked perfect. Now i have made a "backpack" that you carry on your "secondary" slot, but if you pick up the ammo you can now reload and then fire. I am not posting the cpp since it is too much but the "backpack" part looks like this:

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">

class sfpmes : sfpgrg

{

displayname="Mes";

model="\SFP_pskott86\mes.p3d";

enableattack=false;

ammo="";

};

and the weapon is of course "sfpgrg".. looks like this:

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">

class SFPgrg: CarlGustavLauncher

{

magazines[]={"SFPgrgmag","SFPgrgPmag","SFPgrgrokmag","SFPgrglysmag","CarlGustavLauncher"};

canLock=1;

model="\SFP_pskott86\grg.p3d";

modelSpecial="\SFP_pskott86\grgmds.p3d";

picture="\dtaext\equip\W\w_carlgustavlauncher.paa";

modelOptics="\SFP_pskott86\optika_grg.p3d";

displayName="Granatgevär m/48";

displayNameMagazine="Granatgevär m/48";

shortNameMagazine="Granatgevär m/48";

};

Can i make this works somehow?