Underbarrel grenades vog. Cartridge container. Comparison with the American counterpart
In this topic, we are discussing ammunition for the GP-25 / GP-30 / GP-34 underbarrel grenade launchers and the RG-6 revolving grenade launcher.
Let's start with VOG-25, actually I'm too lazy to click and I pulled the description of the ammunition from here: http://weaponland.ru/board/vystrel_vog_25/34-1-0-8 naturally my photos)
And so the description:
VOG-25 grenade launcher shot (GRAU index - 7P17) is a fragmentation ammunition for underbarrel grenade launchers of small arms and is designed to destroy enemy manpower.The VOG-25 shot was developed in the Moscow Design Bureau "Pribor" in the 70s of the twentieth century for the GP-25 underbarrel grenade launcher.
Unlike the Americans, Soviet designers decided to create a shot (a grenade with a starting charge) of a fundamentally new design - with a “flying away” cartridge case.In the VOG-25 shot, the chamber for the propellant powder charge was located directly on the grenade. As a result, there was no need for such an operation as the extraction of a spent cartridge case. After the shot, the shooter only needs to get another grenade out of the bag, insert it into the muzzle of the grenade launcher and push it all the way into the barrel by pressing it. Moreover, this operation is performed with one hand.
The VOG-25 fragmentation shot combines a grenade and a propellant charge in a cartridge case.
The 40-mm VOG-25 round in the middle part has a belt with 12 leading ledges that are included in the rifling, and during the shot they give the grenade rotation. Some breakthrough of powder gases occurring with such a device is acceptable for short-barreled weapons with a small initial velocity of the projectile, with a small propellant charge and with a barrel length almost equal to the length of the shot. A similar design of projectiles for muzzle-loading rifled weapons is not new (three leading ledges had a grenade for a Dyakonov rifled grenade launcher), but it is quite effective.
The fairing brings the shape of the grenade to an ogive, ensuring the correct flight.
Inside the body of the grenade (between the bursting charge and the body) there is a grid of cardboard for the rational crushing of the body into fragments, which helps to increase the fragmentation action. Here it is simply necessary to note that the VOG-25 grenade is 1.5 times more effective at the target than the OFZ projectile of a 30-mm round for the 2A42 cannon, which the BMP-2 is equipped with.
In VOG25, the problem of removing a spent cartridge case, which is rigidly connected to a grenade, is also cleverly solved. When the propellant charge burns, the powder gases enter the breech of the grenade launcher through special holes, ejecting the grenade from the barrel, and with it the cartridge case. With a small weight of the sleeve, this does not adversely affect the ballistics of the grenade.
The afterburning of the charge during the movement of the grenade along the barrel somewhat softens the recoil of the weapon.
The grenade fuse (index VMG-K) is a head, percussion, instantaneous and inertial action, semi-safety type with pyrotechnic long-range cocking and self-liquidator. The cocking distance is from 10 to 40 meters from the muzzle of the grenade launcher. Such a significant variation is due to the temperature range of the weapons (from -40°С to +50°С).
The fuse is unified with a 30-mm VOG-17 round from an AGS-17 grenade launcher.
In case of failure of the fuse, falling into water or viscous soil, the grenade has a self-liquidator that fires 14-19 seconds after the shot.
VOG-25 has a mass of 255 g, a total length of 106.7 mm. The initial speed of a fragmentation grenade is 76 m / s. The radius of continuous destruction by fragments when a grenade falls vertically reaches 10 m.
Underbarrel grenade launcher GP - 25, developed by V.N. Telesh and put into service in 1978, is designed to defeat openly located manpower, as well as manpower located in open trenches, trenches, on the reverse slopes of the terrain. The grenade launcher is used in combination with AKM, AK-74, AKMS, AKS-74 assault rifles. From a grenade launcher, you can conduct flat and mounted shooting. The grenade launcher is loaded from the muzzle of the barrel. For firing from GP - 25 and GP - 30 grenade launchers, VOG - 25, VOG - 25M, VOG - 25P grenades are used.
A set of 10 shots is carried by the shooter in a "bag", which is two cloth cassettes with sockets for shots, 5 in each. Cassettes are located on straps on both sides of the shooter's body, so that shots are available, in whatever position the shooter is. In unloading vests, special pockets for shots for the GP-25 can also be made.
The VOG-25 fragmentation shot combines a grenade and a propellant charge in a cartridge case. A 40 mm caliber grenade is inserted into the barrel without effort. In the middle part of the grenade has a belt with 12 leading ledges, which are included in the rifling, and in the process of firing they give the grenade rotation. Some breakthrough of powder gases occurring with such a device is acceptable for short-barreled weapons with a small initial velocity of the projectile, with a small propellant charge and with a barrel length almost equal to the length of the shot.
The afterburning of the charge during the movement of the grenade along the barrel somewhat softens the recoil of the weapon. The instantaneous fuse is unified with the 30-mm VOG-17 round from the previously adopted AGS-17 grenade launcher. The fairing brings the shape of the grenade to an ogive, ensuring the correct flight. The cardboard mesh on the inside of the case contributes to its uniform crushing into fragments. The radius of continuous destruction by fragments when a grenade falls vertically reaches 10 m.
For safety, the fuse is cocked after the shot only at a distance of 10 - 40 m from the muzzle of the grenade launcher. In case of failure of the fuse, falling into water or viscous soil, the grenade has a self-liquidator that fires 14 seconds after the shot. Then it became necessary to develop a new 40-mm round for an underbarrel grenade launcher with increased fragmentation efficiency against manpower that was lying down and located in unprotected shelters (trenches, trenches, stones, etc.) compared to the VOG-25 grenade, 1.5 - 2 times (without reducing the effectiveness of fragmentation against growth targets). This, frankly speaking, not an easy technical task was brilliantly solved by the team of designers of the State Research and Production Enterprise "Pribor". In 1979, a new 40-mm shot with a VOG-25P fragmentation grenade ("Foundling", index 7P24) was presented for field tests, and in the same year a new shot was recommended for use by the SA.
The main and main difference between the new shot was the head fuse, which received the VMG-P index. VOG-25P ("jumping") is somewhat longer than VOG-25 and is equipped with an expelling charge in the front. When falling to the ground, a fragmentation element is thrown up and explodes at a height of 0.5 - 1.5 m, which made it possible to increase the efficiency of the fragmentation action in comparison with the VOG-25 grenade:
- - for lying targets by 1.7 times;
- - for targets located in the trenches by 2.0 times.
VOG-25 shots are distinguished by high reliability and safety in handling, the safety measures when handling them are the same as when handling large-caliber cartridges for small arms.
Fire from the GP-25 is fired from a standing position, kneeling or sitting. Direct fire, along a flat trajectory, is carried out, as a rule, at a distance of up to 200 m - with the butt resting on the shoulder, 200 - 400 m - "from under the arm", i.e. with the butt clamped under the arm. Shooting along a steep trajectory - with the butt resting on the ground, side or roof of the BMP (BTR). Two riflemen are armed in the GP-25 motorized rifle squad, so that the "grenade launchers" make the smallest units more independent, serve as a means of support for them and as an "assault weapon" in close combat, which plays the greatest role in modern tactics. The low muzzle velocity of the grenade facilitates firing at high angles, the trajectory does not rise too high, the flight time is reduced and the grenade is less blown away by the wind. But with a headwind, the demolition of a grenade becomes dangerous for a grenade launcher. The grenade launcher not only increases the total mass of the weapon (an AKM or AK-74 assault rifle with a GP-25 weighs 5.1 kg), but also shifts the center of gravity forward - down. Accordingly, the average point of impact also shifts down, the weapon begins to "lower", especially when shooting without a stop. The grenade shooter should get used to firing from his machine gun. However, as he gets used to it, he may find that the bursts of fire are much more accurate, a natural result of the heavier weapons and the indicated shift in the center of gravity.
download The action of weapons and ammunition. 2004 download Instructions for the technical inspection and repair of ammunition in the troops. 1973The 40-mm shot VOG-25 (7P17) is unitary in its design and is made according to a "sleeveless" scheme, i.e. the propellant charge, together with the means of ignition, is located in the bottom of the grenade body. Such a shot scheme in domestic practice was used for the first time. It made it possible to greatly simplify the design of the grenade launcher and, accordingly, increase the reliability of the operation of the weapon, coupled with an increase in the combat rate of fire. Shot grenade - fragmentation grenade with a steel case. Inside the body of the grenade (between the bursting charge and the body) there is a grid of cardboard for the rational crushing of the body into fragments, which helps to increase the fragmentation action. Here it is simply necessary to note that the VOG-25 grenade is 1.5 times more effective at the target than the OFZ projectile of a 30-mm round for the 2A42 cannon, which the BMP-2 is equipped with.
Outside the body of the grenade, ready-made rifling is made, which serve to give the grenade a rotational movement (the grenade is stabilized in flight due to rotation) during its movement along the bore. The grenade fuse (index VMG-K) is a head, percussion, instantaneous and inertial action, semi-safety type with pyrotechnic long-range cocking and self-liquidator. The cocking distance is from 10 to 40 meters from the muzzle of the grenade launcher. Such a significant variation is due to the temperature range of weapons (from minus 40 ° C to 50 ° C). Activation time of the self-destruct mechanism -14–19 sec.
In 1978, comparative tests of the GP-25 grenade launcher with a VOG-25 shot and a 40-mm M-203 underbarrel grenade launcher mounted on an M16A1 rifle with an M-406 shot were carried out. Tests have shown a significant advantage of the domestic grenade launcher and a shot to it over a similar US-made system. The VOG-25 and M-406 shots were compared by shooting at the area where the target environment was located, imitating an openly located manpower (lying growth targets). During these tests, it was found that the frequency of hitting targets on the tactical field from a VOG-25 grenade rupture is 3–4 times higher than from an M-406 fragmentation grenade rupture. 
While the designers from TsKIB SOO were designing the GP-25 grenade launcher, namely in 1974, a new task was set for their colleagues from the Pribor GNPP. It was necessary to develop a new 40-mm round for an underbarrel grenade launcher with increased fragmentation efficiency against manpower that lay down and are in unprotected shelters (trenches, trenches, stones, etc.) compared to the VOG-25 grenade, in 1 .5–2 times (without reducing the effectiveness of fragmentation against growth targets). This, frankly, not an easy technical task was brilliantly solved by the team of designers of the State Research and Production Enterprise "Pribor". In 1979, a new 40-mm round with a VOG-25P fragmentation grenade (
"Foundling", index 7P24) and in the same year a new shot was recommended for use by the SA. The main and main difference between the new shot was the head fuse, which received the VMG-P index.
An expelling charge and a pyrotechnic retarder were introduced into the design of the VMG-P fuse, which ensured the “bouncing” of the grenade after hitting the ground and its rupture in the air when firing at all combat ranges of the grenade launcher. The height of the grenade burst when firing at medium-hard ground was 0.75 m, which made it possible to increase the efficiency of the fragmentation action in comparison with the VOG-25 grenade.
Caliber 40 mm
Shot weight 250 g
BB weight 48 g
Shot length 103 mm
The initial speed of the grenade 76 m / s
Grenade self-destruction time is not less than 14 sec.
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VOG-25 grenade launcher shot (GRAU index - 7P17) is a fragmentation ammunition for underbarrel grenade launchers of small arms and is designed to destroy enemy manpower.
P-25 and VOG-25
The VOG-25 shot was developed in the Moscow design bureau "Pribor" in the 70s of the twentieth century for the GP-25 underbarrel grenade launcher.
Unlike the Americans, Soviet designers decided to create a shot (a grenade with a starting charge) of a fundamentally new design - with a "flying away" cartridge case.
In the VOG-25 shot, the chamber for the propellant powder charge was located directly on the grenade. As a result, there was no need for such an operation as the extraction of a spent cartridge case. After the shot, the shooter only needs to get another grenade out of the bag, insert it into the muzzle of the grenade launcher and push it all the way into the barrel by pressing it. Moreover, this operation is performed with one hand.
The VOG-25 fragmentation shot combines a grenade and a propellant charge in a cartridge case.
The 40-mm VOG-25 round in the middle part has a belt with 12 leading ledges that are included in the rifling, and during the shot they give the grenade rotation. Some breakthrough of powder gases occurring with such a device is acceptable for short-barreled weapons with a small initial velocity of the projectile, with a small propellant charge and with a barrel length almost equal to the length of the shot. A similar design of projectiles for muzzle-loading rifled weapons is not new (three leading ledges had a grenade for a Dyakonov rifled grenade launcher), but it is quite effective.
The fairing brings the shape of the grenade to an ogive, ensuring the correct flight.
Inside the body of the grenade (between the bursting charge and the body) there is a grid of cardboard for the rational crushing of the body into fragments, which helps to increase the fragmentation action. Here it is simply necessary to note that the VOG-25 grenade is 1.5 times more effective at the target than the OFZ projectile of a 30-mm round for the 2A42 cannon, which the BMP-2 is equipped with.
In VOG25, the problem of removing a spent cartridge case, which is rigidly connected to a grenade, is also cleverly solved. When the propellant charge burns, the powder gases enter the breech of the grenade launcher through special holes, ejecting the grenade from the barrel, and with it the cartridge case. With a small weight of the sleeve, this does not adversely affect the ballistics of the grenade.
The afterburning of the charge during the movement of the grenade along the barrel somewhat softens the recoil of the weapon.
The grenade fuse (index VMG-K) is a head, percussion, instantaneous and inertial action, semi-safety type with pyrotechnic long-range cocking and self-liquidator. The cocking distance is from 10 to 40 meters from the muzzle of the grenade launcher. Such a significant variation is due to the temperature range of the weapons (from -40°С to +50°С).
The fuse is unified with a 30-mm VOG-17 round from an AGS-17 grenade launcher.
In case of failure of the fuse, falling into water or viscous soil, the grenade has a self-liquidator that fires 14-19 seconds after the shot.
VOG-25 has a mass of 255 g, a total length of 106.7 mm. The initial speed of a fragmentation grenade is 76 m / s. The radius of continuous destruction by fragments when a grenade falls vertically reaches 10 m.
VOG-25 firing device:
40 mm shot VOG-25:
a - general view and marking; b - incision;
1 - fuse; 2 - fairing; 3- gaskets; 4- cardboard grid;
5-body grenade, 6 explosive charge; 7-bottom grenade;
8-powder propelling charge
The VOG-25 shot is unitary in its design. It consists of a grenade with a fuse screwed into the head of the body and a propellant charge into the bottom. A fairing is installed on the body of the grenade.
The grenade consists of a body, a bottom, an explosive charge, a mesh and gaskets.
The body of the grenade has a cylindrical shape, is made of steel and is designed for mounting all parts of the shot, giving the grenade translational and rotational motion in the bore and receiving fragments when the grenade bursts. On both sides of the case, an internal thread is cut for installing the fuse and the bottom. Design options are possible when the bottom is connected to the body by a press fit.
The bottom serves to attach the propellant charge and fix the grenade in the bore of the grenade launcher after loading.
Explosive explosive charge of a cylindrical shape is designed to break the body into fragments and give them a certain expansion speed. The explosive charge is compressed in the body of the grenade by gaskets.
The grid is made of cardboard. It is designed to obtain an organized crushing of the body into fragments.
The fairing is mounted on the body of the grenade and serves to reduce the effect of air resistance.
The powder propellant charge is designed to communicate the grenade's initial speed. It consists of a sleeve in which a powder charge and an igniter primer are placed. The powder charge is closed by a ring and a lid made of aluminum foil.
VMG-K fuse
1 - cover; 2 - gasket; 3, 19, 21, 22, 26, 27, 29, 36 - caps;
4- plate; 5, 39 - stings; 6, 25, 31, 35, 38 - springs; 7 - insert;
8 - nut; 9, 15, 32 - detonator caps; 10 - damper;
11, 17 - bushings; 12 - body; 13 - powder composition; 14 - gasket;
16 - nut; 18 - powder composition; 20 - spring; 23 - gasket;
24 - stopper; 28 - screw; 30 - spring ring; 33 - gear
powder composition; 34 - pin; 37 - primer-igniter;
40 - igniter composition.
The VMG-K fuse is designed to detonate the explosive charge of a grenade. Fuze - head, shock-instant and inertial action, semi-safety type, with pyrotechnic long-range cocking and self-destruction. The fuse is safe in service, during transportation, firing and in flight before cocking, when dropped from a height of up to 3 m on any base in any position.
It consists of shock and ignition mechanisms, a long-range safety cocking mechanism, and a self-destruction mechanism.
The percussion mechanism is designed to transfer the reaction force of the obstacle and ensure the triggering of the firing chain of the fuse. It consists of a cover 1, a screw 28, a cap 3, two plates 4 resting on the tip 5, pressed by a spring 6, and a cap 27, assembled in an insert 7.
The ignition mechanism, which ensures the launch of the long-range cocking safety mechanism, consists of an igniter cap 37, a spring 38, a sting 39, fixed by punching in the sleeve 11.
The long-range cocking safety mechanism, which ensures the safety of the fuse in circulation, consists of a sleeve 17 with a pressed powder composition 18, a cap 19, a spring 20, caps 21, 22, a gasket 23, a stopper 24 holding the shutter 10 with the spring 25 from advancing to the side position. A highly sensitive detonator cap 9 of a pin type is placed in the damper.
The safety-centrifugal mechanism that keeps the shutter from moving to the combat position consists of a pin 34, a spring 35 and a cap 36, placed in the sleeve 11.
The self-destruction mechanism, designed to eliminate a grenade in the event of a failure when it encounters an obstacle, consists of a sleeve 11 with a powder composition 13 pressed into it along the annular path, an igniter composition 40 and a transfer powder composition 33 and a detonator cap 32, fixed by punching in the sleeve 11 .
The fuse mechanisms are located in the body 12 on the gasket 14 and are pressed through the cap 26 with the nut 8 with the gasket 2. In the tail part of the body there is a detonator cap 15, fixed with a nut 16.
In 1978, comparative tests of the GP-25 grenade launcher with a VOG-25 shot and a 40-mm M-203 underbarrel grenade launcher mounted on an M16A1 rifle with an M-406 shot were carried out. The VOG-25 and M-406 shots were compared by shooting at the area where the target environment was located, imitating an openly located manpower (lying growth targets). During these tests, it was revealed that the frequency of hitting targets on the tactical field from a VOG-25 grenade rupture is 3-4 times higher than from an M-406 fragmentation grenade rupture.
For training, VOG-25IN shots (GRAU Index - 7P17I) with an inert grenade or a 7P44U practical shot are used, which can also be used for target designation. To do this, there is a smoke charge, which for 10-15 s. generates a cloud of red-orange smoke. Their ballistics correspond to combat grenades.
While the designers from TsKIB SOO were designing the GP-25 grenade launcher, namely in 1974, a new task was set for their colleagues from the Pribor GNPP. It was necessary to develop a new 40-mm round for an underbarrel grenade launcher with an increased efficiency of fragmentation against manpower that was lying down and located in shelters unprotected from above (trenches, trenches, stones, etc.), in comparison with the VOG-25 grenade, in 1 .5-2 times (without reducing the effectiveness of fragmentation against growth targets). This difficult technical task was brilliantly solved by the team of designers of the State Research and Production Enterprise "Pribor". In 1979, a new 40-mm shot with a fragmentation grenade VOG-25P ("Foundling", index 7P24) was presented for field tests, and in the same year a new shot was recommended for service with the Soviet Army. The main and main difference between the new shot was the head fuse, which received the VMG-P index.
An expelling charge and a pyrotechnic retarder were introduced into the design of the VMG-P fuse, ensuring the "bouncing" of the grenade after hitting the ground and its rupture in the air when firing at all combat ranges of the grenade launcher. The height of the grenade burst when firing at medium-hard ground was 0.75 m, which made it possible to increase the efficiency of the fragmentation action in comparison with the VOG-25 grenade: at lying targets by 1.7 times; on targets located in the trench 2 times.
The same "Foundling"
Attempts to create a fragmentation-cumulative shot during the development of the "grenade launcher" were unsuccessful in terms of ballistics.
In addition to the army, the GP-25 grenade launcher also came into service with the internal troops of the Ministry of Internal Affairs. This caused changes in the grenade launcher ammunition. In particular, the "Nail" shot was developed with a gas grenade equipped with an irritating poison CS.
The weight of the Gvozd grenade is 170 g, the maximum firing range is 250 m, and the minimum allowable one is 50 m, the gas release time is up to 15 s, the volume of the formed cloud is 500 cubic meters.
In addition, grenade launchers with smoke, light and sound and thermobaric grenades were created for special operations of law enforcement agencies.
In the early 2000s, Pribor State Research and Production Enterprise developed the upgraded VOG-25M and VOG-25PM rounds to replace the VOG-25 and VOG-25P rounds. They have a new unified hull with organized crushing during detonation. The number and energy of the resulting fragments provide a 1.5 times greater probability of hitting living targets.
Shot loading. The grenade is fed into the grenade launcher until a characteristic click: USM is brought into combat position.
The grenade launcher is loaded with a VOG-25 shot from the muzzle of the barrel. A 40 mm caliber grenade is inserted into the barrel without effort. The shot must be inserted into the barrel until it stops against the end of the breech. In this case, the shot in the barrel of the grenade launcher is fixed by a special latch, which, in turn, is connected to the transmitting lever that blocks the trigger in such a way that if the shot is not fully sent, firing becomes impossible.
To retrieve an unused shot, press the ejector button. The grenade partially exits the barrel, the trigger of the grenade launcher is deactivated.
Ammunition of 10 shots is carried by the shooter in a "bag", which is two cloth cassettes with sockets for shots, 5 in each. Cassettes are located on straps on both sides of the shooter's body, so that shots are available, in whatever position the shooter is. In unloading vests, special pockets for shots for the GP-25 can also be made. In addition, new equipment for carrying ammunition has been created: two pouches with five pockets for shots are placed horizontally on the stomach and chest and serve as additional body protection.