RX-75R Guntank Mass Production

Commentary
If you are a Shell User, one of the best Sheller units out there is the RX-75 Guntank. However, if skeptical or trying to save money, the Guntank MP is a little nice to test out at a regular supply camp, especially since it's cheaper than either the standard Guntank or the Guntank 2. You can train with it to see what it's like using a Guntank, despite worse Armor and accuracy. Try not to buy this if you can help it though.

One should note, however, that the most notable feature that sets it apart from the Guncannon series is its ability to use the Gun Launcher, which is arguably the strongest shell weapon when you are close to the enemy. However, as a Guntank user, remember that it is a support unit and is a sitting duck on the front lines, so hang back while your allies distract or take the brunt of the attack.

And of course, avoid using this MS in PVP at all, assuming your build is complete, use the RX-75 Guntank instead.