The AEK971 sadly is not actually in large enough use. To my knowledge the gun was designed in the 70/80s as a possible replacement for the AK74 during the Abakan trials. Which the AN94 won. First large batch to be tested out were given to MVD in the early 2000s however when Kovrov plant switched to civilian only in 2006 and the production went to ZID it pretty much ended due to no requirement. Anyways the Russians are probably going to be switching to the AK-200 soon as the AN94 is too expensive/complicated to use for the type of army Russia fields or the type of weapon that they need. So its only given out to special forces. However with enough gamer interest the rifle might come out (previous example WA2000).
Info about gun taken from modern firearms:
http://world.guns.ru/assault/rus/aek-971-e.html