Are there more weapon choices like this?

fessels, I'm sorry... I'm just seeing a blank post... something probably not working with my particular PC... graphics card??

Garnering from fraggle's post, I take it you're talking about the Vindicator in ME2.  It is a great AR, my favorite in that game.  Later on, you will have a chance to collect the Revanant... very powerful weapon, huge mag... almost so good that it breaks the game.

If you're having an issue of running out of ammo, then collect what you can after a battle, then save, and then reload.  The placed ammo will respawn and you can top up using that.  The clips dropped from enemies won't respawn, so be sure to collect them up before you save and reload.  This should ensure that at least you go into each battle with a full load.

Never liked the Vindicator. When playing as a soldier, I use the collector assault weapon until I get the revenant.

When playing as another class that doesn't allow me to use an assault weapon, I use a pistol. A pistol, even one that isn't upgraded, does very well during the mission you're talking about.

Also, I forgot to mention a couple of other ways to maximize the management of your ammo (and these 2 are not "cheats")

1) You can purchase the "Off-Hand Ammo Pack" on the Citadel. When equipped, it will increase your ammo capacity by, I think, 10%. You have to equip it as an armor piece and it can be a little glitchy... sometimes appearing to not take effect when you first start a mission. If you do a quick save and reload after landing on the planet, it will kick in then. If the mission is such that you can't do that, then it will generally kick in after you collect your first ammo, provided you've reloaded your gun before collecting the clip... which brings me to point 2.

2) Get into the habit of reloading your gun before collecting clips and even cycling through the other guns you've used to reload them. That way you are more likely to get a full load out of the clip when you collect it.