The A-91 is a Russian made bullpup assault rifle developed by Instrument Design Bureau in 1990. It fires the 7.62x39mm (A-91 and A-91M) or 5.56x45mm NATO (5.56A-91), depending on the model. There is also a special version chambered in the 5.45x39mm M74 and PSP (underwater) called the ADS. Its magazine holds 30 rounds, and it fires about 700 rounds per minute. It features an optional 40mm GP-95 grenade launcher mounted below the barrel. The A-91 also features a forward case ejection like the Belgian F2000.