Below is a transalated report of the Abakan assault rifle trials. Various weapons were tested by the Russian Forces, particularly the Spetsnaz who were in search of a more accurate alternative to the AK-74 with the AN-94 being the winner, but another rifle listed as the "AO-63", Designed by Simonov & Tkachev fired around 6,000RPM when the 2-round burst mode was selected.
Here is a transalation of the report:
AO-63 specifications:
* Calibre - 5.45x39mm
* Lenghth - 890mm
* Weight - 3.68kg
* Rate of Fire - 850/6,000RPM(2 round burst mode)
* Operation - Unknown but possibly gas/recoil
Sources: http://translate.goo...5D0%259E-63%2B5,45%26hl%3Den%26sa%3DG
http://slovari.yande...ns/guns-067.htm
* Oruzhie magazine, Pages 6/7/8, Issue No1 1998.