I am OK with the concept of Poland having some sort of fledgling military complex, mostly because if filled that roll during the Armenian war and it can come into play so long as it is done right.

But right means zooming out a little bit. One interesting way this could be done is actually pitting an open-market Arms industry [i]against[/i] Poland's own government. I'm not talking about something goofy like a rebellion or coup, but rather a situation where the two both need each other and are at odds. From the perspective of the government, the Polish Arms industry is a major employer and is important both to the stability of the economy and the ability of Poland to uphold any sort of practical military, but that same industry is involved in shady dealings that does not always fall in line with the political position of the government. From the perspective of the Arms industry, the government is necessary for keeping a stable nation-state where the industry can thrive and maintaining the ports and trade relationships necessary for keeping the industry in money. This gives you something to go on. Perhaps it comes in the forms of factions or political parties, where some are in favor of giving the Arms industry everything they want and others want to see the industry reigned in and regulated. You could have plotlines where Polish weapons are being sold to Poland's enemies in Russia and the government finds out about it. Maybe the Arms industry is interested in [s]forcing Hugs to post[/s] selling to Prussia and it weakens the position of the government. Maybe socialists enter as a third party and their calls for workers rights creates a weakness in the Arms industry that the government tries to exploit. 

It doesn't have to be that, of course, but it should be [i]some[/i] sort of story. But you definitely should [u]not[/u] be starting out with some gamey jet tech shit that nobody will remember or pay attention to.