As a company they can and should develop a range of products and to promote those products in different markets.
Market research will give them an idea of what will sell well and what will not, but I suspect there can be surprises either way.
Izhmash has enormous production capacity, so having 10 rifles available for sale in 5-6 calibres each is not a huge problem, but it leads to choice for the consumer.
Certainly the AK12 seems to have all its ergonomics sorted, but the Ak-107 wasn't a bad design. I would suggest it will actually be the AK-108 that will be exported as it is the 5.56mm model. Some customers might find the AK-107/108 is the best solution for their needs while remaining compatible with all the components they already own from previous AK-100 series weapons... ie stocks and parts etc.
I rather suspect that different departments within Izhmash will have been tasked with different challenges and different budgets, so one group might be working on the AK-74M4 which is an AK-74M with pic rails and other upgrades based on the AK-74M, while another group will be doing the same with the AK-107/108. A third group might have been allowed to be a bit more radical with the AK and this is the AK-200 team whom have removed the front iron sights and fitted a balanced recoil mechanism but the controls are basically the same, and the AK12 which has modified pretty much everything but so far has not shown a balanced recoil mechanism AFAIK.
Following Russian Army testing they might go for a combination of the AK12 for spec ops teams and VDV and Naval Infantry etc, and upgraded AK-74M4 for the majority of the army where it is just old AK-74Ms with new stocks and receiver covers etc etc.
Or they might decide to buy all AK12s for everyone.
Their decision is obviously important but it makes sense for Izhmash to look at civilian versions of all their rifles because they will likely have a much higher profit margin from civilian sales than from military contracts and the more types they have to sell the more markets will have a choice.
[quote]The AK-107 is basically a 30-40 year old design that was successfully tested, but wasn't adopted due to cost.[//quote]
First of all let me say the balanced recoil mechanism design is not new... there were balanced recoil mechanism AKs competing to replace the AKM in the 1970s that lost too.
Second it wasn't exactly rejected because of cost because the trials are still ongoing AFAIK. Its problem is to offer a sufficient improvement in performance to warrant the cost of its purchase... it needs to be better by x amount.
The US has had several competitions to replace its M16 and some have been very interesting, but they were not so much better as to warrant the cost of buying all new weapons.
What I am trying to say is that if the Russian Army currently had no rifle then they could buy AK-107s as a better choice than an AK-74M... the problem is that they already have AK-74s and the AK-107s are not so far deemed worth the cost and bother to replace them. (ie AK-107 is not bad, but not sufficiently worth the replacement hassle).