The Kalashnikov SR1 is a semi-automatic gas operated rifle with recoil-mitigating balanced action. This means that rifle features two gas pistons, entering single gas block above the barrel from opposite directions. The rear gas piston is attached to the bolt carrier group. The forward gas piston (which moves opposite to the rear one) is attached to a sliding counterweight, located above the bolt carrier group. Both counter-recoiling masses are synchronized by a pair of rotating gears, so after each discharge rearward and forward movement of the bolt group is balanced by a counter-moving mass attached to the forward gas piston, effectively canceling impulses generated by heavy reciprocating parts. As a result, rifle generates less felt recoil and is much easier to hold on target in rapid fire.