Next time, let's try to make friends with the US rather than steal from them.
Ok, on to more important stuff. We need to hold the Mountains. The Ore we're getting is useful to us and more importantly, allowing the Mountains to be held by Moskurg could be very bad. Their LMG is very useful.
Here's what I propose. This year, we design a sniper rifle and revise our SMG's size so it becomes an assault rifle. Arstotzkans would do very well with sniper rifles. An assault rifle would be more useful, however. If we manage to get it cheap, we can get 5 soldiers with medium-range, automatic firepower compared to their 1 with the Brumby. As a nice bonus, it'll help us keep our ground in the Jungle.
The alternative is to design the assault rifle (basing it off the SMG so the SMG becomes cheap) and use our Revision to improve our infantry armour and camo.
The AS-SR23 is a 12.7mm scoped sniper rifle. It's bolt action and carries a detachable magazine of 5 bullets. It uses aluminium to decrease weight/increase performance. (1 Ore)
The AS-AR23 is a 7.62mm assault rifle based on the mechanics of the MC16. It uses a simplified version of the SMGs mechanisms, making it cheap. Aside from its cheapness and its overall reliability (thanks to being based on the MC16), it also has less recoil than other 7.76mm guns and can switch between semi-auto and full-auto. It uses aluminium to decrease weight/increase performance. (1 Ore)
Glory to Arstotzka.
EDIT: Just so everyone knows my priorities, my priorities are taking back our ground in the Mountains, then the Jungle, then continuing our war in the Desert.
EDIT2: They've developed trucks and will quickly be able to exploit the resources of whatever region they capture.
EDIT3: SMGs and assault rifles are extremely useful in urban environments, both historically and in the battle report. (Despite being Expensive, they played a key role in the urban fight when we were taking the Plains.) We now have rebels in our home ground and these new weapons will help us take care of them.
EDIT4: I suspect the US is behind these rebels. We've both tried stealing from them, the US wants revenge, and this is the kind of thing they've historically done before.
EDIT5:
On the plus side, they can't really take advantage of that aluminum since it would simply be too expensive, and we can use a revision on our 1910s to make them lighter so they can be more mobile. That leaves what to design.
We tried making the 1910 more mobile and we got the 1910 Mag out of it. Revising it won't help.
EDIT6: Our sniper rifle should outclass their recoilless rifle due to its scope. Moskurgs can hit with their recoilless rifles only what they can see, after all.
EDIT7: Next turn, our armoured car becomes cheap unless we lose the Mountains. If we got cheap cars, we'd completely outnumber the enemy in the desert because they have absolutely no cheap vehicles. Our T15s also become merely Expensive but they're not that useful so whatever. Blitzkrieg all the way to Moskurg!