At present guided shells are becoming available in greater numbers in Russia. So an aircraft with armored belly, long loiter time, low flying ability and enough defense to evade enemy MANPADs or AA guns would be very useful in low intensity conflict where the air superiority is confirmed ie. Syria.
In my point of view a small number of gunships should come very handy in RuAF. Large number is not needed because they have their impacts mostly on low intensity conflicts. I'd at max 10 and minimum 5 should be enough. Because there are lots of cases where CAS aircraft are not enough.
Now about the aircraft! I used to think An-70 or a 4 four engine version of An-140 is the best candidate for this mod but Antonov is dead so those are no longer any option. Jet powered aircraft would be too costly for long loiter and low-mid altitude (Correct me if I'm wrong!). So a Russian turboprop aircraft is needed. Russia currently has Il-112V only to offer as turboprop transport which is too light for gunship role.
So my thoughts are a 4 engine bigger version Il-112V can be made. Or even Il-214 airframe can be modified for 4 turboprop instead of 2 PD-14! Il-214 is an MTA so it can do the job pretty well. Idk if jet powered can be useful in this role, if yes Il-214 can be directly used without any engine change. Or even the old Il-38s can do!
Now defenses, first thing I'd put is an armored belly at least to carry on against 23mm gun (or 30?). A bunch load of flares and other defenses obviously needed. Defense systems to detect small projectile as well as missiles from ground. The system should be able to detect AA projectiles and move the aircraft from interception path. Using flares and other defenses as needed.
Sensors, the focus is on Air to Ground operation so all the latest A2G systems Russia has in production should be considered here. I'm not expert in these so I'm asking you guys to come up with something.
Weapons, I'd put at least 1x100mm gun of the BMPs. They have low recoil and good HE performance. Also I think their AP/APCR/HEAT can easily penetrate the roof any type of armors in service today or coming in near future. As secondary weapon I'd put at least 1x30mm gun depending on which aircraft we are using. If its big enough 57mm can be used instead of 30mm. Garry's 23mm can be also considered. So there can be 2x23mm gun as well. Where to put these gun I'm asking you guys to write because I'm noob about aircraft balance and space availability stuffs.
NOTE: enough ammo also need to be carried.
At wing hardpoints, I'd put 2 in total. For carrying external fuel tanks or ATGM racks like attack helos got.
I know there are lots of correction needed in my article so please start commenting