[FuNkYTheGreat]

You want infinite ammo right ? if yes then try this
GivePlayerWeapon(playerid, 36, 9999); // it will give player Sniper Rifle with unlimited bullets ( 36 is the id Of Sniper Here are all weapon id's https://sampwiki.blast.hk/wiki/Weapons and 9999 mean Unlimited Ammo Of your sniper. )