Alright, after taking a bit of a break, how far is Arstotska, and lets start selling the M3 Sorraia to the chinese and the british. Or just plain giving it to the latter. Still worth while.
Anyway, to me there's two things we need: Namely, a tougher tank, or a bigger tank cannon. We can also use a new AA gun and fighters, and possibly a new weapon to replace the model 1 rifle.
So, here's a few suggestions from me.
Model 28 Rifle
With the experience from the MK-47, develop a gas-operated, rotating bolt assault rifle, preferably in bullpup configuration. Developed with a new .28 round in mind to reduce the recoil while maintaining the killing power of the of the old .30 round it's derived from. The magazine should hold about 20 rounds (30 if we can.) in a double-column, dual-feed magazine. The new rifle should have a decent fire rate of around 600 RPM
Bombardier "Skykiller"
Using the same shell size as the old bombardier, this new AT-AA combo comes mounted on a larger, four-wheeled carriages for a greater traverse without needing to be towed, and able to aim high enough to swat their aircraft out with flak rounds, and low enough to make their tankers fear Moskurg's might HEAP rounds. Comes with a new reflector optics system to minimise the eye-strain while aiming, and the gun comes with a shield to protect the crew from anything short of a proper tank cannon from the front.
Model 4 'Yellowjacket' Fighter
Moskurg's first full-aluminium craft, using the designs for a fuel-injection system nicked from Arstotzka on a v12 petrol engine. Using six Sorraia MGs in the wings and a stallion modified to fire through the propeller shaft, and a radio system to ensure squadron cohesion. This time, however, this craft has low, and has an enclosed cockpit so as to allow the pilot to reach much higher altitudes without passing out, or falling to their doom.
M28 Grenades
Basically a hand-held HE grenades to basically flip the finger at Arstotzka's current monopoly. Built as a stock grenade with one explosive 'head', with the ability to strap other heads to increase the explosive power in exchange for a heavier grenade.
S2 Struunk II armoured car
A replacement for our venerable armoured car, the II is an essentially new vehicle. Using experience gained from all out recent automotive advancements, the Struunk II mounts a petrol engine using a fuel injector. Mounting sloped RHA armour enough to stop the 20mm autocannon on the front, and the 1.6 inch breaker cannon with a Sorraia as it's coaxial MG, the Struunk II is essentially meant to both one-up the Arstotzkan AC, whilst also replacing ours with a much more versatile and effective vehicle. Also coming with it is an independent suspension system and the near-flat undercarriage courtesy of the tiger's design: Which should mean it has more speed and manoeuvrability in rough terrain like sand or mud.