No, no, my good friend. Not from the video. That one has to be a modified AK-104 of some sort.
In the stills from the video above I would suggest that the curve of the magazine means it must be a 7.62 x 39mm mag.
Regarding:
I was referring to this photo below. It's definitely an AK-12. But, there's a little issue with figuring out what caliber. From what I understand, there's absolutely no working 5.45x39mm drum that looks like the 7.62x39mm model like this. Thus, it would have to be a 7.62mm variant, correct?
Your quite right, that is an AK12, and I have not seen a drum magazine like that in 5.45mm calibre, which is not to say they don't exist, but I would expect the different shape shell case would lead to a different shaped drum, so I would agree this weapon is probably 7.62 x 39mm calibre.
I was thinking perhaps they could extend the handguards over the gas block and just have a detachable front sight.
Detachable would not be very soldier friendly... too easy to lose. Besides a fold down front iron sight at the end of the top mounted pic rail would be most convenient, but I personally think if they are going with a multi calibre system then having a separate iron sight on the barrel makes a lot of sense. Sure it means that if you carry 10 spare barrels you are carrying 10 front iron sights, but with the iron sights on the barrel means you can zero each barrel using its own front sight so you wouldn't need to rezero if you have to swap barrels during a mission.
In comparison the old model M60 machine gun had a fixed front iron sight so you either had to zero the each barrel and remember the rear sight settings before a mission and then try to reset the rear sight when you change between barrels, or just set an average zero and hope for the best.
Of course whether it is on the gas tube or near the muzzle, as long as it is part of the barrel that is swapped for different barrel lengths and calibres it should be fine.
Perhaps with an improved 5.45x49 they could make the 7.62x39 redudent.
Technically... as far as the Russian military is concerned, the 7.62 x 39mm is redundant but it still has its uses. To make it subsonic the 5.45mm round has an 80 grain projectile... so basically it is a .22lr with a double weight projectile (normally 40 grain). In comparison the 7.62 x 39mm has a 193 grain 311 calibre projectile travelling at a similar subsonic speed... which would be far more lethal.
The 5.45mm is designed to be lethally effective because of its velocity, but in certain conditions its light fast projectile can be deflected or simply not reach the target.
I rather suspect the best solution will be heavier bullets for the 5.45mm that retain high velocities due to more powerful propellant.
The new 6 x 49mm cartridge is really designed to replace the 7.62 x 54mm round and probably would not be suited to shorter barrel carbine weapons.
It would be a bit of a headache to have the AK-107 and AK-12 marketed to the military.
Not really. Assuming the AK12 family is pretty complete and includes the small calibre assault rifle and larger calibre assault rifle calibres it could replace a wide range of currently in service weapons... from the Vityaz-SN SMG, AKS-74U assault rifle calibre SMG, AK-105 carbine, AK-74M rifle, RPK-74 LMG, and in a 7.62 x 54mm or 6 x 49mm heavy rifle it could replace the SVDS as a Designated Marksman rifle.
Not only that, but a 9 x 39mm model could replace the AS and VSS weapons used in recon units and a 12 gauge version could be used in urban combat for door breaching.
The AK-107 on the other hand with its balanced recoil mechanism could be used by special forces units in situations where they need lots of rounds on target rapidly and accurately.
Pretty much the AK-107 would be in 5.45mm calibre only, while the AK12 would be in 9 x 19mm for the SMG, 5.45mm for the SMG, Carbine, Rifle, and LMG, while for the SVDS replacement could be in 7.62 x 54mm and perhaps a LMG version of the heavy rifle version in the same calibre. The 12 gauge could be in 3 1/2 inch magnum or 12/89 calibre. The AS and VSS replacements would have integrated suppressors and would come in 9 x 39mm calibre with a 12.7 x 55mm calibre option in the heavy rifle.
To add to that I would have a few pistol types... PYa, Strihz, Gyurza, a few SMG types (as the AK12 model Vityaz-SN is large) say Kashtan, Klin/Kedr, and PP-2000, and a few sniper rifles like the SV-98, SV-99, SV-338, and a few 50 cal and 57 cal sniper rifles and that would be all they needed.
They only need one I think. It is confirmed that they will be working on a civilian version of the AK-107 along with the AK-12, not sure if they will try to push the AK-107 on the military market, not out of the possibily though.
Both would have merits for the military and the civilian market. I would suspect they will push both everywhere... when you don't know exactly what the customer wants then you are best to give them options rather than you picking one yourself and hoping you have guessed right.
The last competition they lost the Nikonov... this time I think they are going to cover all their bases... which means one will be accurate and easy to use, one will be a cheap upgrade of existing types that can be applied to rifles in service, and one will be a little radical and offer the best increase in performance at the likely expense of production costs and increased training.
There is no reason to believe one design will win all... the Russian government customers range from the military to the interior ministry, to the FSB and each will have different wants and needs. I suspect the military might go for a mix of upgrades and new weapons, while other groups might receive large numbers of excess stock from the military.