Izhevsk Mechanical Plant (Russian: Ижевский Механический Завод, Izhevsky Mekhanicheskiy Zavod) or IZHMEKH (ИЖМЕХ) was a major firearms manufacturer founded in Izhevsk in 1942 for manufacturing small arms.

It was one of the primary factories producing Mosin–Nagant and SVT-40 rifles during World War II for standard issue to Soviet troops.

After the end of World War II, it continued producing firearms, both for military (Makarov pistols) and hunting applications, and later high-tech weapons and civilian machinery.

In 1982, the plant produced a small number of double barreled shotguns IZh-41.

On August 13, 2013, Izhmash and Izhevsk Mechanical Plant were merged and formally renamed Kalashnikov Concern.