Something

////////////

enum playerInfo {
	pName[24],
	pWeaponKIlls[48]
}
new pInfo[MAX_PLAYERS][playerInfo];

public OnPlayerDeath(playerid, killerid, reason)
{
	pInfo[killerid][pWeaponKills[reason]]+=1;
}

GetFavWep(playerid)
{
	new pHighest, pFavWep;
	for(new i=0; i<48; i++) {
		if(pInfo[playerid][pWeaponKills[i]]>pHighest) {
			pHighest=pInfo[playerid][pWeaponKills[i]];
			pFavWep=i;
		}
	}
	new WepName[30];
	GetWeaponName(pFavWep, WepName, 30);
	return WepName;
}