 The burst and fully automatic modes had a high rate of fire of 1800 rounds per minute.The 4.5x26 MKR was claimed to be on par with a 5.56×45mm NATO M-193 bullet at up to 300 meters while one could carry 3.5 times the amount of cartridges.Its slender 4.5mm projectile could penetrate a steel helmet up to 300m out to which range it had a similar ballistic curve to the 5.56x45NATO with M-193 projectile.