Unfortunately new guns in this game cost a ton of gold, so you’re going to be stuck with the two starting weapons for a while. The new guns actually aren’t that great starting out and they need a lot of upgrades to make them worthwhile. You’ll need to upgrade them of course, but it’s better than pouring the gold into a brand new gun. The M629 and the M10 you start out with at the beginning of the game should last you sometime. Considering that the support missions usually only give you somewhere around 100-200 gold for completing them, the daily challenges are a big part of your income. The daily challenge can be completed once a day and you get around 500 gold for doing so. This won’t be so important later on but early on in the game you’re going to be really hurting for gold. After the first couple of main missions, you’ll unlock the Daily Challenge.