Tag Archive for '7.92mm'

Page 2 of 2

7.92 mm Granatbüchse 39 (Gr. B. 39): Grenade-Launching Rifle

7.92 mm Granatbuchse 39 (Gr. B. 39): Grenade-Launching Rifle

The German grenade-throwing rifle (Granatbüchse 39) is a modification of the Pz. B 39 antitank rifle. The breech and shoulder stock are the same. Some parts, such as the bipod, bipod lock, carrying sling, sling band, and carrying handle are the same as on the Pz. B 39 but are at different locations on the barrel.

The barrel has been shortened to 24 1/8 inches. At the forward end, 4 7/16 inches of the barrel have been turned down to 13/16-inch diameter, and threaded back approximately 1 3/8 inch to accommodate the launcher base. The standard sights have been replaced by special sight equipment. The wooden forearm has been removed, and the carrying sling has been changed to the right side because of the position of the new sights. The bipod mount is located 6 3/4 inches forward of the breech.

The launcher threaded to the barrel is the Scheissbecher, which is also used on the Mauser Kar 98K rifle, firing the same grenades as with the present weapon. The launcher is 7 inches long; the inner tube is 5 1/8 inches long and 1 1/2-inch in external diameter.

Three types of grenades can be fired from the weapon: (1) antipersonnel grenade (Gewehr Sprenggranate); (2) small antitank grenade (Gewehr Panzergranate); (3) large antitank grenade (Gross Gewehr Panzergranate). The propelling medium used is a wooden bulleted blank cartridge. The cartridge case used is a standard 7.92/13 mm case such as is used in the Pz. B 39 antitank rifle.

SPECIFICATIONS


Caliber of launcher         3 cm (1.18 in.)
Weight 23 lb.
Length 48 1/2 ins. extended
35 3/4 ins. folded
Length of barrel 24 1/8 ins.
Length of barrel with discharger 29 1/2 ins.
Feed Handfeed
Effective range 80 yds. on moving targets
136 yds. on stationary targets
Front sight Special grid type sight graduated up to 150 meters for the Gewehr Panzergranate grenade
Hear sight Fixed sight with open U notch

German: p. 212

7.92 mm Panzerbuchse 39 (Pz. B. 39): Antitank Rifle

7.92 mm Panzerbuchse 39 (Pz. B. 39): Antitank Rifle

The German antitank rifle, Pz. B 39, 7.92 mm, is a weapon of opportunity which is used by the German Army against vehicles having light and medium armor. It fires a cartridge similar to that used in the Polish Mascerzek antitank rifle. This cartridge also resembles the American .50/.30 which has been under development in this country since 1931.

The projectile has a tungsten carbide core and is known to have a small pellet of a lachrymator as well as a tracer mixture. Penetrating power of the bullet at 300 yards’ range is 3/4 inch at 20°, and 1 inch at normal against face-hardened plate. At 100 yards’ range, penetration is 1 1/4 inches at normal.

The weapon has proved to be a simple and reliable gun. The recoil is comparatively light. The rifle is manually loaded and fired single shot from the shoulder with the aid of a bipod. It is equipped with a circular turbine muzzle brake.

The Germans also have an earlier version of this weapon known as the Pz. B 38 which is 7 pounds heavier, has a self-ejecting action, and is more elaborate than the hand-operated Pz. B 39. It fires the same ammunition as the more recent rifle.

The Pz. B 39 uses ammunition boxes holding 10 rounds each, mounted on brackets on each side of the wood stock. These are not magazines but serve to hold the ammunition so that it can be quickly and easily removed for hand loading.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 27.25 lb.
Length (with shoulder stock extended) 62.25 ins.
Ammunition 13 mm case necked down to 7.92 mm. Bullet has tungsten carbide core with tracer and lachrymotor mixture.
Sights Rear, fixed with open U notch. Front covered blade.
Capacity Single rounds
Muzzle velocity 3,540 f/s

German: p. 211

7.92 mm Karabiner 43 (Kar. 43): Semiautomatic Rifle

7.92 mm Karabiner 43 (Kar. 43): Semiautomatic Rifle

The Karabiner 43, a gas-operated, semi-automatic, magazine-fed, air-cooled shoulder weapon, is basically the same in design as the Gewehr 41 (W) described on page 208. Two notable changes found in the later weapon are a modified gas operation and a change in manufacturing policy.

This weapon utilizes a gas vent and gas piston, a method used for the first time in German small arms weapons in the Fallschirmjäger Gewehr 42. The improved gas operation insures more positive operation, and malfunctions due to carbonization are less likely to occur.

A great deal of effort was put into an attempt to reduce the time and expense in the manufacture of this weapon. In order to accomplish this, forgings and stampings were used in as many parts as was practical. Machined or ground surfaces are found only where necessary to insure proper operation. The bolt, bolt channel, and contacting surfaces of the trigger group are included in these. Such surfaces as the outside of the receiver, the top of the retractor slide, and the non-contacting surfaces of the trigger group are left untouched.

Several other slight changes were made, the most notable being the use of a ten-round, detachable box-type magazine; the addition of a threaded section on the muzzle making it possible to attach a flash hider or an adapter which is used with blank ammunition; the omission of the bayonet stud; and the addition of a telescopic sight base indicating that the Kar. 43 is intended for use as a special weapon. The weapon is lighter and better balanced than the Gewehr 41 (W) due to the elimination of the gas trap assembly at the muzzle and the long piston rod.

SPECIFICATIONS


Caliber       7.92 mm (.312 in.)
Weight 8 lb., 9 oz.
Length 44 1/4 ins.
Principle of operationGas
Feeding deviceDetachable box-type magazine
Capacity of feeding device10 rounds
Cooling systemAir
Ammunition usedAll 7.92 mm Mauser types
Type of sightParallel sided, flat top blade type front sight. Tangent leaf rear sight graduated from 100 to 1,200 meters. Telescopic sight base at rear of right side of receiver.
Length of barrel22 ins.
Rifling
   Twist Uniform R.H.
   Form
   No. of grooves4
   Depth of grooves
   Width of grooves
Chamber pressure
Muzzle velocity
Muzzle energy
Maximum range
Effective range

German: p. 208.2

7.92 mm Gewehr 41 (M): Semiautomatic Rifle

7.92 mm Gewehr 41 (M): Semiautomatic Rifle

The Gewehr 41 (M) is a self-loading, gas-operated, clip-fed, air-cooled shoulder weapon. It is basically the same as the Gewehr 41 (W) except for several changes that have been made in the manufacture and appearance.

Most of the parts of the Gewehr 41 (M) are machined pieces with the exception of the magazine well, follower, piston rod and butt plate. The majority of the machined pieces have had no further finishing, but are of a very high quality. The upper band, lower band, magazine well, magazine follower, trigger guard, piston rod, dust cover and butt plate of the Gewehr 41 (M) are stamped pieces.

The differences between the Gewehr 41 (M) and the Gewehr 41 (W) are as follows: the piston rod of the G. 41 (M) terminates in a yoke, the two arms of which extend rearward and contact the bolt head. The piston rod of the G. 41 (W) is one piece and is in direct contact with the bolt retractor slide. The handguard of the G. 41 (M) is made of wood unlike that of the G. 41 (W) which is plastic.

SPECIFICATIONS

Caliber        7.92 mm (.312 in.)
Weight 10 lb., 13 oz.
Length without bayonet 46 1/8 ins.
Principle of operation Gas
Feeding device Vertical box-type magazine
Capacity of feeding device 10 rounds
Cooling system Air
Ammunition used All 7.92 mm Mauser types
Type of sight Inverted V blade type front sight; tangent leaf rear sight; graduated 200 to 1,200 meters.
Length of barrel 21 1/2 ins.
Rifling
   Twist Uniform R.H. twist
   Form
   No. of grooves 4
   Depth of grooves
   Width of grooves
Chamber pressure
Muzzle velocity
Muzzle energy
Maximum range
Effective range

German: p. 208.1

7.92 mm Gewehr 33/40: Carbine

German 7.92 mm Gewehr 33/40: Carbine

This carbine, a typical Mauser, is very similar to the latest model of the Kar 98K. It is a manually operated, air-cooled, clip-fed shoulder weapon, having a laminated wood stock, a large metal butt plate to protect the stock when grenades are launched, and a sling mounted on the left-hand side.

The Gewehr 33/40 and the Kar 98K have interchangeable bolts. The most obvious differences are found in the length, weight, hand guards, and bolt handles.

The present weapon has an overall length of 39 1/8 inches as compared to the 43 1/2 inches of the Kar 98K. The barrel length is 19 3/8 inches instead of 23 1/2 inches. The carbine weighs 7 pounds 11 ounces; the rifle 9 pounds. The hand guard on the Gewehr 33/40 extends behind the rear sight and covers a greater percentage of the barrel than the one on the Kar 98K. The bolt handle on the carbine is turned down uniformly forming a semi-circle, and the knob on the end of the handle has been hollowed out and milled flat on the underside to reduce weight. On the Kar 98K, the bolt handle slopes down abruptly at right angles and the knob is solid.

SPECIFICATIONS

Caliber       7.92 mm (.312 in.)
Weight 7 lbs., 11 ozs.
Length (overall) 39 1/8 ins.
Principle of operation Manually operated, bolt action
Feeding device Clip-fed, hand-loaded magazine
Capacity of feeding device 5 rounds
Cooling system Air
Ammunition All 7.92 mm Mauser Types
Type of sight Inverted “V” or barleycorn front sight with hood protector and tangent leaf rear sight graduated from 100 to 1,000 meters.
Length of barrel 19 3/8 ins.
Length of rifling
Rifling
   Twist Uniform R.H.
   No. of grooves 4
Muzzle velocity 2,509 f/s

German: p. 206.2 (March 1, 1945)

7.92 mm M SS 41: Antitank Rifle

7.92 mm M SS 41: Antitank Rifle

This antitank weapon, a manually operated, magazine-fed, air-cooled, high-velocity rifle which was standardized for production in 1941, fires the same necked-down cartridge as the Panzerbüchse 39. Although classified as an antitank rifle, the use of heavier armor on modern tanks has rendered the weapon effective against lightly-armored vehicles only.

A hinged bipod similar to that of the MG 34 is attached to the front of the receiver jacket. It folds forward for convenience in carrying. The gun is also equipped With carrying handle and sling; the former is fitted to the top of the barrel group, and the latter is attached on the right side at the bipod and back plate assembly.

A “U” type rear sight and an adjustable front sight of the square block type fold to the rear when not in use.

The gun is put in a “Safe” position by pulling the barrel housing lock extension 1/4-inch to the rear so that its rear alignment mark is aligned with the mark “S” on the barrel housing lock. When in this position, the trigger cannot be pulled, nor can the action be opened. If the trigger is pulled while the action is not entirely closed, the gun will not fire. It is necessary to release the trigger and pull it again in order to release the sear. When the magazine is empty, the action is kept open by the protrusion of the magazine follower which stops the rearward movement of the barrel housing.

SPECIFICATIONS

Caliber       7.92 mm (.312 in.)
Weight (with empty magazine)29 3/4 lbs.
Length (overall)59 1/4 ins.
Sight radius30 15/16 ins.
Principle of operationManually operated
Feeding deviceMagazine
Capacity of feeding device6 rounds
Cooling systemAir
Ammunition types13 mm case necked down to 7.92 mm. Same as used in the PZ B39. See Page 211.)
Rate of fire
Type of sight“U” type rear sight; square block type front sight.
Weight of barrel (w/fittings)13 1/4 lbs.
Length of barrel43 3/8 ins.
Length of rifling
Rifling
     TwistR. H.
     Form
     No. of grooves4
     Depth of grooves
     Width of grooves
Muzzle velocity (estimated)3,540 f/s
Type of mountBipod

German: p. 210.1 (May 1, 1945)