Tag Archive for 'submachine gun'

9 mm M.P. 34/1 (Bergmann): Submachine Gun

9 mm M.P. 34 Bergmann Submachine Gun

The Bergmann 9 mm machine pistol, M.P. 341, is a semi- or full-automatic, air-cooled, blow-back-operated submachine gun which is fed by a box magazine containing 32 rounds. It is manufactured commercially in Germany for use by the German Army. It is also used by other countries in modified forms. This is only one of several types of submachine guns.

The barrel and moving parts are, except for the trigger mechanism, housed in a long cylindrical tube. The forward end of this tube is perforated and forms a cooling jacket for the barrel; the rear portion serves as a receiver or housing for the bolt group. The M.P. 341, unlike the M.P. 181, is cocked by a turning bolt handle, and has a positive safety mechanism.


Caliber         9 mm (actually .347 in.)
Length 33 ins.
Length of barrel 7 3/4 ins.
Weight 9 lb.
Feed Box magazine—capacity 32 rds.
Rate of fire 500 rds./min. (maximum)
  120 rds./min. (practical)
Range 218 yds. (effective)
Sights Front—blade
  Rear—Leaf on ramp, graduated up to 1,000 meters

German: p. 204

9 mm M.P. 38 and M.P. 40 (Schmeisser): Submachine Gun

MP 38 and MP 40 Schmeisser Submachine Gun

This submachine gun was originally designed for use by parachute troops but is now in general use in all combat units of the German Army. It is a gun of simple construction, reliable operation, and general accuracy.

The Model M.P. 40 like its predecessor the M.P. 38 is air-cooled, blowback operated, and fitted for a 32-round box magazine. It can be used as a shoulder or hip weapon, being equipped with a folding shoulder stock.

As the trigger is pulled, the sear disengages the sear notch in the bolt. As the bolt travels forward it pushes the top round from the magazine into the chamber. The extractor keeps the firing pin from hitting the primer until the round is chambered then snaps under the cannelure of the cartridge allowing the base of the cartridge to come back against the face of the bolt. As the cartridge is fired, the bolt starts to recoil. At the proper point, the ejector hits the base of the cartridge, pivoting it out into the ejection opening. The bolt compresses the operating spring at the same time. The buffer plunger hits the end of the small operating spring tube, compressing the buffer spring and stopping the recoil of the bolt. The bolt then moves forward to repeat the cycle of operation.


Caliber       9 mm (actually .347 in.)
Weight with loaded magazine 10 lb., 7 oz.
Weight with empty magazine 8.87 lb.
Length with stock extended 33.25 ins.
Length with stock folded 24.75 ins.
Barrel length 10 ins.
Capacity of magazine 32 rounds
   Front Partridge type ramp with hood
      Fixed Open V notch, sighted at 100 meters
      Folding Open V notch, sighted at 200 meters
Muzzle velocity 1,040 f/s-1,250 f/s
Range, effective 200 yds.
Rate of fire (practical) 80 to 90 r.p.m.
   (cyclic) 518 r.p.m.

German: p. 206

9 mm M.P. 181 (Bergmann): Submachine Gun

9mm M.P. 18 Bergmann Submachine Gun

The 9 mm German Submachine Gun, M.P. 181, Germany’s original submachine gun introduced toward the end of the first World War, is still in use today. Several other models, modifications of this weapon, are, however, more widely used at the present time.

The gun is operated, like all the later types, by blowback action and carries on the left side a 32-round drum magazine of rather complicated design, consisting of a short straight portion terminating in a small drum. For loading, a lever in the bottom of the magazine is turned until a catch drops into a recess in the bottom plate, thereby taking the tension off the coil spring. The cartridges are then inserted into the mouth of the magazine. After it is fully loaded, the catch is released and pressure applied to the cartridges by the coil spring. A safety recess marked “S” is formed at the rear end of the cocking handle slot. To prepare for firing, the cocking handle is pulled back and rotated upward, the magazine is inserted, and the cocking handle is disengaged. There is no provision for single shots, the weapon being automatic.


Caliber         9 mm (actually .347 in.)
Weight 9 lb., 2 oz. without magazine
Length 32 ins.
Rate of fire 550 rds./min.—cyclic
Ammunition 9 mm Parabellum
Effective range 218 yds.

German: p. 204

8 mm Submachine Gun, Type 100 (1940)

8 mm Submachine Gun, Type 100 (1940)

The Japanese 8 mm submachine Gun, Type 100, is an automatic, air-cooled, magazine-fed, straight blowback-operated type, firing from an open bolt. Its basic design strongly resembles that of the German submachine guns. The weapon may be broken down into three main groups: a receiver which contains the bolt and driving spring, a barrel assembly, and a wooden stock assembly containing the trigger and trigger guard. A considerable amount of rough welding is used on the weapon; the front sight, bayonet lug, barrel lock, magazine well, driving spring guide, and trigger guard have all been attached to the rifle by this method. An unusual feature of the gun is a replaceable firing pin which screws into the face of the bolt.

The weapon has a high cyclic rate of fire, estimated between 800 and 1,000 rounds per minute.

It differs from the Type 100 (1940) Paratrooper’s rifle, described on page 204.1, in the following respects: it does not have a folding stock; a standard bayonet can be mounted directly on barrel and barrel jacket; and the rear sight is fixed rather than of the sliding ramp type.


Caliber      8 mm (.315 in.)
Weight with sling and magazine9 lbs., 2 oz.
Weight of magazine9 oz.
Length (overall)36 ins.
Sight radius
Principle of operationStraight blowback
Feeding deviceCurved box magazine
Capacity of feeding device30 rounds
Cooling systemAir
Ammunition types8 mm pistol
Rate of fire (cyclic)800-1,000 rds. per min. (est.)
Type of sight—Front:Inverted “V”
                      Rear:“V” with small peep additional.
Weight of barrel
Length of barrel9 3/16 ins.
Length of rifling8.3 ins.
   TwistR.H .
   No. of grooves6
Muzzle velocity1,050 f/s
Maximum range
Effective range

Japanese: p. 204.2 (August 1, 1945)

8 mm Paratrooper’s Submachine Gun, Type 100 (1940)


This Japanese paratrooper’s submachine gun is a light, blowback operated, automatic weapon which fires the regular issue bottle-necked 8 mm pistol cartridge.

The gun, which is provided with a bayonet, also has a folding stock; that is, the stock is cut through just behind the receiver and hinged so that by releasing two locking hooks on the left side, the stock swings to the right and forward 180 degrees at the hinge and parallel with the barrel. The barrel and barrel jacket are held in place by a single screwpin threaded at the base and with a folding wingnut head, enabling changes without tools. The receiver assembly is machined in two units, with the units shrunk fit in final assembly.

Two features of the firing mechanism which are of unusual interest are the fixed firing pin which screws into the face of the bolt, and the feeding and chambering bar which insures that the cartridge is very nearly chambered before the firing pin can touch the primer.

In the illustrations above, the top picture shows the weapon as fired, and the photograph at lower left shows the method of folding. A bipod is frequently used with this gun as illustrated in the photograph at lower right.


Caliber       8 mm
Weight (without bayonet, magazine, & sightleaf) 7 lbs., 11 ozs.
Length (stock extended, without bayonet) 34 ins.
Length (stock extended, with bayonet) 49 ins.
Length (stock folded, without bayonet) 22.25 ins.
Sight radius 20 ins.
Principle of operation Blowback, bolt action
Feeding device Curved box magazine; staggered feed type.
Capacity of feeding device 30 rounds
Cooling system Air
Ammunition types 8 mm bottle-necked pistol cartridges
Rate of fire 400-450 r.p.m.
Type of sight Leaf
Length of barrel 9 ins.
Length of rifling 8.125 ins.
     Twist Uniform R.H., approx. 1 in 12
     No. of grooves 6
Muzzle velocity 1,080 f/s

Japanese: p. 204.1 (August 1, 1945)