Tag Archive for '7.92mm'

7.92 mm M.G. 37 (t) (Brno): Heavy Machine Gun (Ex-Czech)

7.92 mm M.G. 37 (t) (Brno): Heavy Machine Gun (Ex-Czech)

The M.G. 37 (t), 7.92 mm machine gun is one of the weapons taken over by the Germans after the occupation of Czech territory. It is gas-operated, belt-fed, air-cooled, and has a flexible mount.

The M.G. 37 has been designed for use on tanks and other Armored Force vehicles, but it is also effective as a heavy ground machine gun when mounted on a tripod.

The firing-control mechanism used in this weapon is different from that in other tank-mounted guns. Adjustments can be made for rapid and slow fire by use of a pivoting buffer system, and full-automatic or semi-automatic fire by use of an indicator on the trigger casing. A buffer is used to reduce the shock of the recoiling parts, and to insure smoother action. Initial cocking is accomplished by moving the cocking slide forward, the sear in this gun being moved to the front. By moving forward instead of to the rear, the type of cocking in this weapon makes it more adaptable for use in confined spaces such as tanks or other vehicles.

The weapon, being of Czech origin, uses an action similar to that of such guns as the Czech ZB, the Bren, and the British Besa. It is possible to change the barrel very easily on this weapon, although it is not a quick-change barrel. The gun does not have to be dismounted when this change is made.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 45 lb., 10 oz.
Length 43 1/2 ins.
Weight of barrel 14 lb., 14 oz.
Length of barrel 28 7/8 ins.
Operation Gas-operated
Feed Belt-fed
Rate of fire         520 rds./min.—slow
820 rds./min.—fast

German: p. 216

7.92 mm M.G. 42: Dual-Purpose Machine Gun

7.92 mm M.G. 42: Dual-Purpose Machine Gun

This is the latest known type of German machine gun. It is apparently intended eventually to replace the M.G. 34 which it resembles somewhat. The M.G. 42, however, is far easier to manufacture than the earlier gun and is less finished in appearance, because of the wide use of stamping, welding, and riveting.

The M.G. 42 is air-cooled, recoil-operated, gas-assisted, belt-fed, and is fitted with a quick barrel-changing device. It has a much higher rate of fire than the M.G. 34, but it is said to be less accurate than the earlier weapon.

This gun can be used on a bipod as a light machine gun, on a tripod as a heavy machine gun, as an antiaircraft machine gun, and for numerous other special purposes on special mounts. The barrel jacket and receiver are constructed of pressed steel welded lengthwise with runways welded into the receiver for the bolt. The cover and feed mechanism, which is made of stamped steel, is hinged at the front of the receiver. The shoulder stock is plastic. The right side of the barrel jacket is left open so that when the bolt is retracted the barrel may be removed and changed. A lever in a recess on the right side of the barrel jacket forces out the rear of the barrel. This is a very simple and fast barrel change.

The action is different from the M.G. 34 in that the bolt does not lock to the barrel extension by a turning bolt head, but rather by two rolls set in the bolt head which lock bolt and barrel extension together by running into camways in the barrel extension when the bolt head hits the barrel extension.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight of gun with bipod 26 lb.
Weight with heavy machine gun tripod mounting 65 1/2 lb.
Overall length 48 ins.
Principle of operation Recoil, assisted by muzzle recoil booster
Cooling system Air
Feeding device Metallic non-disintegrating link belt
Capacity of feeding device 50 rd. lengths and multiples thereof, and 50 rd belt drums
Sights (a) Inverted V front sight and leaf rear sight with open V notch graduated from 200 to 2,000 meters.
  (b) Separate antiaircraft rear sight hinged on the rear sight base.
  (c) Antiaircraft ring-sight to be fitted on barrel jacket.
  (d) Telescopic sight on a tripod when used as a heavy machine gun.
Rifling 4 grooves right-hand concentric
Muzzle velocity 2,500-3,000 f/s
Maximum range (as L.M.G.) 2,200 yds.
Effective range (as L.M.G.) 600 yds.
Rate of fire (cyclic) 1,335 r.p.m.
Ammunition used All 7.92 mm Mauser ground types (except antitank rifle ammunition)

German: p. 215

7.92 mm M SS 41: Antitank Rifle

7.92 mm M SS 41: German WW2 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 radius 30 15/16 ins.
Principle of operation Manually operated
Feeding device Magazine
Capacity of feeding device 6 rounds
Cooling system Air
Ammunition types 13 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 barrel 43 3/8 ins.
Length of rifling
Rifling
     Twist R.H.
     Form
     No. of grooves 4
     Depth of grooves
     Width of grooves
Muzzle velocity (estimated) 3,540 f/s
Type of mount Bipod

German: p. 210.1

7.92 mm PzB 35 (p): Antitank Rifle (Ex-Polish)

7.92 mm PzB 35 (p): Antitank Rifle (Ex-Polish)

During the Polish invasion, the Germans captured large numbers of the Mascerzek Model 35, 7.92 mm antitank rifle. These were used extensively in the earlier part of the war.

This Polish rifle is a weapon similar in design to a Mauser rifle firing a normal cartridge, but it is longer and heavier, and a muzzle brake has been attached. It led to the development of the German rifles, known as the Pz. B. 38 and Pz. B. 39.

This weapon is a bolt-action gun of the modified Mauser type and has a detachable box magazine. It is carried by a sling attached in the usual manner. It may be recharged with ammunition by exchanging the magazine or by reloading the empty magazine with single rounds. The body is a hollow cylinder with an ejection and loading aperature on top and a magazine slot at the bottom. The bolt is cylindrical with a straight lever at right angles on the right side (in the closed position).

The barrel, which is parallel throughout most of its length, increases in diameter toward the breech until it equals that of the body. At the muzzle, a portion is threaded to take a muzzle brake. The bipod is of light construction and is attached to the barrel by a yoke. The legs of the bipod terminate in circular shoes which are cut away on the inside to clasp the barrel when they are folded forward in a closed position. The magazine is of the box type.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 20 lb. (approx.)
Length 5 ft., 10 ins.
Ammunition Steel jacket with A.P. steel core and lead antimony filler
Sights Rear, fixed; front, adjustable blade
Capacity 5 rds., in clips
Muzzle velocity 4,100 f/s

German: p. 210

7.92 mm Gewehr 41 (W) (G.41 W.): Semi-Automatic Rifle

7.92 mm Gewehr 41 (W) (G.41 W.): Semi-Automatic Rifle

This is the German semi-automatic rifle performing approximately the same tactical mission as the United States, Cal. 30, M1 rifle. It is gas-operated, clip-fed, and air-cooled. It is a shoulder weapon, slightly heavier than the American semi-automatic. Three versions exist, the G 41 (M) which is probably an interim model, the G-41 and the G 41 (W) which are more than likely the final or production types.

The rifle is well made, but quite difficult to manufacture. Stampings are used wherever possible.

In lieu of the customary gas port, a form of gas trap is used, so designed that when attached to the muzzle it makes it necessary for the bullet, after leaving the barrel, to jump a gap and momentarily block the muzzle opening of the cone. The resulting gas pressure then drives a gas piston, in the form of a collar around the barrel, to the rear. The action is imparted to an operating rod the end of which is in contact with the forward end of the retractor slide which is also driven to the rear. A projection on the underside of the retractor slide engages the bolt locking lugs, withdrawing them from the locking recesses in the receiver. The bolt assembly and retractor slide then recoil together for the remainder of the recoil distance. Extraction and ejection are accomplished in the usual manner.

A thorough test at Aberdeen proved the G 41 (W) is much inferior to the U.S. Rifle, Cal. 30, M1, in reliability under severe conditions. It fell down especially in the mud and rain tests, and breakages were very numerous.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight of rifle w/o bayonet and sling 10 1/4 lb.
Length w/o bayonet 45 ins.
Length of barrel 21.6 ins.
Principle of operation Gas—semi-automatic
Cooling system Air
Magazine system and capacity
     Fixed vertical box 10 rds. staggered
     Method of feed two 5-round Mauser rifle clips
Sight radius 21.2 ins.
Sights Blade front sight with “T” base and tangent leaf rear sight graduated from 100 to 1,200 meters. No windage adjustment.
Rifling 4 grooves, uniform right-hand twist
Muzzle velocity 2,408 f/s (in a worn barrel)
Trigger pull 7-8 lb.
Ammunition used All 7.92 mm Mauser rifle types
Total number of parts 102
Number of coil springs 13
Number of flat springs 4
Time to fieldstrip 3 1/4 seconds
Time to assemble from fieldstrip 4 3/4 seconds
Time to diassemble 3 min., 57 sec.
Time to assemble         8 min., 32 sec.

German: p. 208

7.92 mm M.G. 81: Flexible Aircraft Machine Gun

7.92 mm M.G. 81: Flexible Aircraft Machine Gun - Luftwaffe WW2

The German Aircraft Machine Gun, M.G. 81, 7.92 mm, is a Mauser designed air-cooled, belt-fed, recoil-operated (gas assisted) weapon which fires from an open bolt. The weapon is light and easily manufactured and is now used in place of the German M.G. 15 in many German aircraft. It is a flexibly mounted gun and serves as an observer’s weapon.

A “Solothurn type” bolt head is rotated by cams and locked to the barrel by an interrupted thread. It appears to be a speeded-up type of the light machine gun, M.G. 34. The higher rate of fire is achieved by a powerful buffer spring fitted into the body, as well as by general lengthening of all parts, and some redesign. The recoil operation is assisted by a nuzzle booster. The barrel is unusually short, being only 183 inches long. A push-type safety catch is located in the trigger guard just forward of the trigger. This can be moved only when the gun is cocked.

The weapon is fired only at full-automatic fire. The method of feeding is by a disintegrating-link belt through the feed block. A barrel casing made of perforated sheet metal encloses the barrel and fits into a sleeve which screws into the front of the body. The weapon has a muzzle booster which screws onto the barrel housing. This weapon is made and used in a dual mount with single trigger operation for both mounts.

SPECIFICATIONS

Caliber        7.92 mm. (.312 in.)
Weight 13 lb., 14 oz.
Length 35 ins.
Length of barrel 18.75 ins.
Operation Recoil, gas assisted
Fire Automatic only
Muzzle velocity* 2,500-3,000 f/s
Rate of fire 1,200 to 1.500 rds./min.
Ammunition All 7.92 mm Mauser types

*Muzzle velocity varies according to ammunition used.

German: p. 221

7.92 mm M.G. 17: Fixed Aircraft Machine Gun

7.92 mm M.G. 17: German WW2 Fixed Aircraft Machine Gun

The German 7.92 mm aircraft machine gun, M.G. 17, is an air-cooled, recoil-operated, gas-assisted, belt-fed, pneumatically charged, fixed weapon fired electrically by solenoid. It differs from the M.G. 15 in that it fires from a closed bolt. Three types of links have been found used with the belt feed of this weapon: sectionally disintegrating, fully disintegrating, and nondisintegrating. The gun, which has a fixed mount, is well constructed with excellent machining throughout.

All parts are of steel with the exception of the rear buffer housing which is of cast dural with an anodized finish. The rest of the gun is covered with a good parkerized finish. The barrel is connected to the barrel extension by an interrupted thread type fastening. The bolt is of the Solothurn rotating type and operates on small steel rollers.

The M.G. 17 is used in many types of German aircraft, and is stationed in various positions so that it may be fired unsynchronized or synchronized through the propellor arc by solenoid.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 27 lb., 11 oz.
Length 47 3/4 ins.
Length of barrel 23 5/8 ins.
Muzzle velocity 2,800 f/s
Rate of fire 1,000 rds./min. (synchronized)
1,100 rds./min. (unsynchronized)
Operation Recoil, gas assisted
Fire Automatic only
Rifling 37° uniform right-hand twist, 1 turn in 10 ins.

German: p. 220

7.92 mm M.G. 34/41: Dual-Purpose Machine Gun

7.92 mm M.G. 34/41: Dual-Purpose Machine Gun

The German 7.92 mm machine gun, M.G. 34/41, represents one of the later developments of the M.G. 34. These developments occurred in the following order: the M.G. 34; M.G. 34 modified; M.G. 34s; M.G. 34/41. In the course of development, the original pattern of the weapon has been largely retained, but each stage has tended toward simplification and elimination of machined parts.

The M.G. 42 is a new design but has the same tactical employment. It is distinguished by a high cyclic rate of fire and fewer machined parts. The M.G. 42 is described on a separate page.

The M.G. 34 modified is used principally in armored vehicles and differs from the M.G. 34 in that it has a heavier barrel jacket adapted to fit ball-type tank hull mounts, a simplified firing-pin nut lock, and bipod clamps for attaching bipod in emergency use; it has no A.A. sight bracket. It can also be mounted on antiaircraft and heavy ground mounts.

The M.G. 34s and the M.G. 34/41 are identical in appearance, except for the barrel jackets, but are marked as distinct models. They differ from the M.G. 34 as follows: provision for full-automatic fire only; simplified trigger group; shorter barrel with enlarged muzzle end; elimination of firing-pin lock nut; large buffer group; heavier recoil spring; modified feed mechanism. These models can be used on antiaircraft mounts but appear designed for the heavy ground mount.

SPECIFICATIONS

Caliber        7.92 mm (.312 in.)
Weight 24 1/2 lb. w/o bipod
Weight of barrel 3 3/4 lb.
Length 44 1/4 ins.
Length of barrel 19 3/4 ins.
Muzzle velocity* 2,500-3,000 f/s
Rate of fire 800-900 rds./min. cyclic
Operation Recoil, gas assisted
Ammunition All 7.92 mm Mauser ground types

*Muzzle velocity varies according to ammunition used.

German: p. 214

7.92 mm Karbiner 98K (Mauser-Kar. 98K): Rifle

7.92 mm Karbiner 98K (Mauser-Kar. 98K): Rifle

This is the standard shoulder weapon of the German Army and is very similar to the M1903 rifle used in the American Army. Known as the Mauser Kar. 98K, it may be regarded as a carbine or a short rifle.

This rifle has no windage adjustment or peep sight but gives good results at medium range. It is a bolt-operated, magazine-fed shoulder weapon.

Older models of this weapon, which operate in the same fashion, differ only in having longer barrels and in minor variations in fittings. They are known as the Gewehr 98, Kar. 98, and Kar. 98B.

The safety is a thumb-operated lever mounted on the bolt plug, operating in the same manner as the safety on the U.S. Rifle, M1903 (Springfield). The rifle is also loaded in the same manner as the M1903 rifle—the empty clip being ejected as the bolt is closed. Double-pull trigger action is also similar. A short knife bayonet is made for this rifle and several types of rifle grenade launchers may be attached. At least two different types of telescopic sights are found when this rifle is used for sniping. One is the ZF39, a conventional Zeiss 4X sight attached to mounts which are fitted to the receiver ring and bridge. The other, the ZF41, is a short 1 1/2 x scope with long eye-relief of 16 3/4 in. which is attached to the rifle by a side mount which is attached to the left side of the rear sight base.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight (approx.) 9 lb.
Overall length 43.5 ins.
Length of barrel 23.4 ins.
Principle of operation Manually operated bolt action
Capacity of magazine 5 rds.
Sights
     Front Inverted V blade (which is sometimes equipped with a hood)
     Rear Leaf with open V notch sliding on ramp, graduated from 100 to 2,000 meters.
     Telescopic See Text
Muzzle velocity 2,600-2,700 f/s
Range
     Maximum (approx.) 2,500 to 3,000 yds.
     Effective (approx.) 600 to 800 yds.
Ammunition 7.92 mm German Mauser ground types

German: p. 207

7.92 mm M.G. 15: Flexible Aircraft Machine Gun

7.92 mm M.G. 15: Flexible Aircraft Machine Gun

The M.G. 15, a reliable weapon, was the standard flexible aircraft machine gun in the German Air Force until it was replaced by the M.G. 81, because the latter is more easily manufactured. It is still used in some aircraft, however, and has been recently modified by the addition of a bipod and ground sights for use as a ground weapon for air force troops. Its efficiency as a ground gun is questionable because of the difficulty of changing barrels.

It is a recoil-operated, gas-assisted, drum-fed, air-cooled, automatic gun. The M.G. 15 has a Solothurn-type action, except that the locking arrangement is placed on the rear of the bolt instead of on the bolthead as in other German Solothurn-type guns. It was the first Nazi weapon to be fed by a saddle-type drum.

The Japanese have painstakingly copied it, even to the ammunition, and call their version the Model 98 (1938) 7.92 mm Aircraft Flexible Gun.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Ammunition All 7.92 mm Mauser types
Weight 15 lb., 2 oz.
Feed Saddle-type drum (75-rd. capacity)
Rate of fire (cyclic) 1,000–1,100 rds./min.
Mount Flexible ball or ground bipod
Sights Aircraft ring and post or ground type.
Front—Blade. Rear—Adjustable open sight graduated 0-1200 meters (0-1308 yds.) in graduations of 200 meters.

German: p. 219