PP-90M1

The PP-90M1 is a russian machine pistol intended to compete with the PP-19 Bizon in the russian law enforcement market, it was designed to arm law enforcement officials, army special forces soldiers and riot police and interior troops.

Description
The very idea to integrate in one design the features and capabilities of both the box-type and worm-type magazines led to an advent of modular versions. The Tula-based KB Instrument Design Bureau has developed the PP-M1. It has little resemblance, if at all, to the PP-90M and is chambered for the powerful 7N31 and 7N21 type 9x19 cartridges with bullets of enhanced penetration performance as well as standard 9mm cartridges "luger" or 9x9 NATO. The weapon is blowback operated and has a conventional configuration. Barrel and receiver components are separately assembled, in doing so, the slides for a bolt travel and ejector are arranged on the barrel, the bolt's impact in the rear point is practically absent. This allowed designers by using a plastic body made integral with a pistol grip and a trigger guard to decrease the weight and cost, to enhance resistance to corrosion, and shift forward the centre of gravity. Time of duration of the automatic cycle enabled to optimise rate of fire and enhance handling of the weapon. Instead of a bolt handle appeared a seldomly used method, on the butt protruding from the body over the barrel in the fore part of the bolt appeared an incision, so emerged a cocking button. In addition to decrease of the weapon's weight this also enhanced airtightness of its body.

The firing mechanism is of a hammer type that ensures a single-shot and automatic mode of fire. The safety-selector is arranged to the left over the trigger guard. The shot is fired from the rear sear.

A plastic worm-type magazine bears strong resemblance in terms of its design to the PP-19 "Bizon-2" and Calico magazines. The dual-row box magazines are made from metal. The worm magazine is attached directly to the body, while the box-type magazine is attached via an adapter-fore grip.

In the course of the weapon's improvement developers in the Central Design Bureau decided to discard the adapter and now the PP-90M1 submachine gun is outfitted only with the worm-type magazine. The metallic stock is folded in an upper-forward position.

Specifications

 * Caliber: 9mm
 * Cartridge: 7N21, 7N31, 9x19 Parabellum
 * Weapon weight without cartridges: 1.6 kg
 * With unfolded stock: 620 mm
 * With folded stock: 410 mm
 * Rate of fire: 500-600 rds/min
 * Sighting: 200 m
 * Magazine capacity: 32 rds (box type) 64 rds (worm type)