Something

forward DropPlayerWeapons(playerid);
forward DeletePickup(pickupid);
forward GetWeaponModel(weaponid);

new DropLimit=6;

public OnPlayerDeath(playerid, killerid, reason)
{
    DropPlayerWeapons(playerid);
 	return 1;
}

public OnPlayerPickUpPickup(playerid, pickupid)
{
	return 1;
}

public DropPlayerWeapons(playerid)
{
    new playerweapons[13][2];
    new Float:x,Float:y,Float:z;
    GetPlayerPos(playerid, x, y, z);

	for(new i=0;i<13;i++){
    	GetPlayerWeaponData(playerid, i, playerweapons[i][0], playerweapons[i][1]);
    	new model=GetWeaponModel(playerweapons[i][0]);
		new times=floatround(playerweapons[i][1]/10.0001);
		new string[256];
        format(string, sizeof(string), "%d", times);
        times=strval(string);
    	new Float:X=x+(random(3)-random(3));
    	new Float:Y=y+(random(3)-random(3));
    	if(playerweapons[i][1]!=0)
		{
		    if(times>DropLimit) times=DropLimit;
	    	for(new a=0;a<times;a++)
			{
			    if(model!=-1)
				{
					new pickupid=CreatePickup(model, 3, X, Y, z);
					SetTimerEx("DeletePickup", 10000, false, "d", pickupid);
				}
			}
		}
	}
	return 1;
}

public DeletePickup(pickupid)
{
	DestroyPickup(pickupid);
	return 1;
}

public GetWeaponModel(weaponid)
{
	new model;

	switch(weaponid)
	{
	    case 1: model=331; case 2: model=333; case 3: model=334;
		case 4: model=335; case 5: model=336; case 6: model=337;
		case 7: model=338; case 8: model=339; case 9: model=341;
		case 10: model=321; case 11: model=322; case 12: model=323;
		case 13: model=324; case 14: model=325; case 15: model=326;
		case 16: model=342; case 17: model=343; case 18: model=344;
		case 22: model=346; case 23: model=347; case 24: model=348;
		case 25: model=349; case 26: model=350; case 27: model=351;
		case 28: model=352; case 29: model=353; case 30: model=355;
		case 31: model=356; case 32: model=372; case 33: model=357;
		case 34: model=358; case 35: model=359; case 36: model=360;
		case 37: model=361; case 38: model=362; case 39: model=363;
		case 41: model=365; case 42: model=366; case 46: model=371;
	}
	if(model<300) return -1;

	return model;
}