Mendoza HM-3

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	Weapon: Mendoza HM-3 Type: Submachine Gun Country of Origin: Mexico Year Adopted: 2011 Caliber: 9mm Luger Action: Blow Back Fully Automatic Overall Length (mm): 635.0 Overall Length (in): 25 Weight (kg): 2.70 Weight (pounds): 5.95 Effective Range (m): 50 m Effective Range (yards): 54.68

The Mendoza HM-3 is a Mexican submachine gun developed by Productos Mendoza in the late 20th century. Designed as a cost-effective and reliable weapon for military and law enforcement use, the HM-3 is chambered in 9x19mm Parabellum and features a simple blowback operation with a closed-bolt firing mechanism. The weapon is constructed primarily from stamped steel, reducing production costs while maintaining durability. It is fed from a 32-round detachable box magazine and has a folding stock, making it compact and easy to handle in close-quarters combat.

Production figures for the Mendoza HM-3 remain relatively limited compared to other widely used submachine guns, as its primary users have been Mexican security forces and select law enforcement agencies. The weapon was designed to serve as an affordable alternative to foreign submachine guns, offering a locally produced option for Mexican forces. Despite its limited production, the HM-3 has been appreciated for its simplicity, ease of maintenance, and effectiveness in urban environments.

While the Mendoza HM-3 has not gained widespread international recognition, it holds significance as part of Mexico's efforts to develop and produce its own small arms. The weapon has seen service with police and military units, particularly in counterinsurgency and law enforcement operations. Its role remains primarily domestic, and it is rarely encountered outside of Mexico. Today, the HM-3 continues to be a functional and reliable submachine gun, representing Mexico's capability in small arms manufacturing.