Entering production at the eve of 1938, this 30mm repeating cannon was designed to simotaniously supplant the TNsh heavy automatic weapon and the aging 1-K 37mm field gun.
This particular variant was intended to be mounted on an improved version of the 1-K gun carrage that offered greater traverse, hence the infantry designation-

Performance wise, this gas operated weapon had an effective penetration of 40mm at 500m and around 60 at 0m, it's perfomance greatly superior to it's predecessors thanks to it's long L65 barral.
The rate of fire was limited to around 90RPM and was somewhat hampered by the's 16 round box magazine.
Under optimal conditions this weapon performed superbly however, it tended to degrade somew