Yeah, I'd say Russian.
It's good that they went with AK-102s rather than .223 krinks.
I've got a buddy that has a .223 krink and I think it's a waste of a kit and reciever.
Out of a 9 inch barrel (standard krink length) a .223 projectile is not going nearly fast enough for fragmentation. Fragmentation is the key to .223 wounding success. Without fragmentation, the .223 just punches little icepic holes in the target. The 14 inch M4 barrel barely gets the velocity up to 27,000 feet per second, the borderline for reliable fragmentation, and it is only good for about 150 yards. (That's why the guys in Afghanistan are griping about the effectiveness of the M4's at extended ranges). The AK-102 (pictured above) has a barrel length of 12 inches.
5.45, on the other hand, does not rely on fragmentation for terminal wounding, but on the air pocket in the tip of the bullet. When the 5.45 bullet hits flesh, the core of the bullet slides forward in the pocket due to inertia. This destabilizes the bullet and it tumbles, causing effective wounding.
I personally wouldn't want a .223 with a barrel under 14 inches. Does anyone know of a military unit that fields a .223 with a barrel shorter than 12"?
5.45 Krinks are quite common.