Heckler & Koch manufactured the HK G28 in Germany. This sniper rifle was created by order of the Bundeswehr and was intended for German military units stationed in Afghanistan. The HK G28 rifle is mainly used by small infantry units. The basic model for its creation was the HK MR 308 self-loading weapon intended for hunting and sports, which, in turn, was nothing more than a variant of the HK417 automatic rifle. The structure and design of the Heckler und Koch HK G28 is similar to the Dragunov SVD.
Rifle in action
The Heckler und Koch arms company, founded in 1949, specialized in the production of military rifles. The company changed its direction in 2009, when it completely switched to the production of sporting and hunting rifles. This company also cooperates with the US Department of Defense, the requirements of which the products of this German company fully comply with.
Performance characteristics (TTX) of HK G28
| Name | Caliber | Total length m | Barrel dimensions mm | Empty rifle weight 28 G kg | Number of rounds that fit in the magazine |
| HK G28 | 7.62x51 | 1,028 | 420 | 5,8 | 10/20 |
The width of the sniper rifle weapon is 78 mm, and the height is 340 mm. There is lightweight and standard. options, but they differ little in size. For example, the “Standard” model has a long forend, a folding bipod, and a telescopic sight. This weapon uses optics from the company Schmidt and Bender RMP 3-20x50.
The lightweight modification is only a slightly shortened version of the standard one. A lightweight forend is installed on it, the butt can be adjusted, but it is not equipped with a cheekpiece, unlike the butt for a standard rifle. The sight is used from the company Schmidt and Bender RMP 1 8x24. Most often, this model is used by the police in raids around the city.
Additionally, laser pointers or night sights are connected to the rifle. Various accessories have also been developed for it. For example, a belt, thanks to which the rifle can be carried on the shoulder or behind the back. Since the rifle is afraid of dirt, this device effectively solves the problem.
| Heckler & Koch HK G28 Standard version |
In 2011, the famous German specially commissioned by the Bundeswehr (German Army) created a new sniper rifle, which was designated HK G28.
| Standard | Patrol | |
| Caliber, mm | 7.62×51 NATO (.308 Win) | |
| Length, mm Buttstock folded Buttstock unfolded | 914 1003 | |
| Width, mm | 82 | |
| Height, mm | 191 | |
| Barrel length, mm | 420 | |
| Weight without cartridges, kg | 7.5 | 5.9 |
| Store, count. cartridges | 10, 20 | |
| Initial bullet speed, m/s | 780 | |
| Muzzle energy, J | 3000 |
The Heckler & Koch HK G28 sniper rifle was developed at the request of German troops fighting in Afghanistan as a support weapon for small infantry units. The main purpose of this rifle is to provide the ability to conduct effective fire at ranges inaccessible to standard weapons of 5.56 mm caliber (about 400 meters and beyond), in conditions where the use of more powerful support weapons (machine guns, mortars, artillery, etc.) for any reason is impossible.
The Heckler & Koch HK G28 sniper rifle was created on the basis of the HK MR308 sports and hunting self-loading rifle, which, in turn, is a civilian version of the HK 417 automatic rifle. Despite a number of differences, the HK G28 in its design is 75% interchangeable with parts HK 417.
The automation of the Heckler & Koch HK G28 sniper rifle operates using gas-operated automatics with a short stroke of the gas piston and a rotating bolt. The two-position gas regulator ensures reliable operation of the weapon, both in normal mode and when using a shot silencer.
Heckler & Koch HK G28 (view of controls)
The trigger mechanism provides only a single type of fire.
An ambidextrous, two-position manual safety is located above the pistol grip.
The weapon is fed with ammunition from detachable box magazines with a capacity of 10 or 20 rounds.
The barrel is cantilevered inside the forend.
The rifle receiver consists of two halves - the upper steel and the lower aluminum alloy.
On the forend on four sides and on the upper surface of the receiver there are STANAG 4694 NATO guides (compatible with MIL-STD-1913 “Picatinny” rails) for attaching various sighting devices and other accessories (laser sights, flashlights, tactical grip, etc.).
The stock is telescopic, sliding, multi-position.
| Heckler & Koch HK G28 Standard, equipped with night sight |
To solve various problems, it is envisaged to use the HK G28 rifle in several configurations, which can be changed in the conditions of a military base:
Heckler & Koch HK G28 Standard, Equipped with a thermal imager
- Standard - the standard configuration of the HK G28 rifle includes an extended forend, a telescopic adjustable buttstock with a cheekpiece, a folding bipod, as well as a Schmidt & Bender PMII 3-20×50 optical sight and a laser mounted on top rangefinder. — Patrol – the patrol configuration makes it possible to lighten the weapon for use in foot raids, for which the rifle is equipped with a shortened and lightweight forend, a lightweight adjustable buttstock without a cheekpiece and a Schmidt & Bender PMII 1-8×24 sight.
The production of rifles of the HK G28 model was launched in Germany.
For the Heckler & Koch HK G28 sniper rifles, the manufacturer declared an accuracy of no worse than 1.5 MOA (minutes of arc) in groups of 10 shots. The effective range of aimed shooting at a chest target is up to 600 meters, suppression shooting (at a height target) is up to 800 meters.
In its concept, the Heckler & Koch HK G28 sniper rifle is an analogue of the Soviet Dragunov SVD sniper rifle.
| Heckler & Koch HK G28 Patrol version |
Rifle design
The automatic function is to use a gas outlet with a short stroke. The shutter is rotary. A two-position gas regulator ensures constant and uninterrupted operation of the HK 28 sniper rifle. It also works smoothly with a silencer.
Sight HK G28
USM - for single shots. The receiver itself is divided into two parts. The top of the rifle is made entirely of steel, the lower part is made of aluminum alloy. The stores are made in the form of a box with the amount of ammunition from 10 to 20 pieces.
According to reviews from snipers, the weapon is quite comfortable due to the ergonomics of the handle and butt. In battles in Afghanistan, the rifle performed well.
It is loved because the HK G28 can shoot in a way that conventional rifles that use 5.56mm cartridges cannot boast of. The HK G28's shot accuracy is no more than one and a half minutes of arc and it is especially effective where it is impossible to use such powerful support weapons as:
- machine gun;
- mortar;
- artillery.
Firing range with NK G 28 - 600 meters. If you shoot at a tall target, the range increases to eight hundred meters.
Heckler-Koch sniper rifle Heckler – Koch HK G28 (Germany)
Heckler-Koch sniper rifle Heckler – Koch HK G28 in a lightweight “patrol” configuration
Heckler-Koch sniper rifle Heckler – Koch HK G28 in standard configuration, with laser rangefinder and additional opo-electronic adapter for night shooting
| Caliber | 7.62×51 NATO (.308 Win) |
| Type | Self-loading, gas outlet with short piston stroke |
| Length | 1003 - 914 mm |
| Barrel length | 420 mm |
| Weight, with scope and empty magazine | 7.5 kg (“standard”) 5.9 kg (“patrol”) |
| Magazine capacity | 10 or 20 rounds |
The Heckler-Koch HK G28 sniper rifle was developed and manufactured by the German company Heckler-Koch for the Bundeswehr (German Army). This rifle appeared as a response to the needs of German troops operating in Afghanistan as a support weapon for small infantry units. The Heckler-Koch HK G28 sniper rifle has become a conceptual analogue of the Soviet Russian Dragunov SVD rifle. The Heckler-Koch HK G28 rifle provides infantry with the ability to conduct effective fire at ranges inaccessible to standard 5.56mm weapons (about 400 meters and beyond), in conditions where the use of more powerful support weapons (machine guns, mortars, artillery, etc.) ) is unavailable or unacceptable for any reason. The Heckler-Koch HK G28 sniper rifle is based on the HK MR308 sports and hunting self-loading rifle, which, in turn, is a civilian version of the HK 417 automatic rifle.
For the Heckler-Koch HK G28 rifle, the manufacturer guarantees an accuracy of no worse than 1.5 MOA (minutes of arc) in groups of 10 shots. The effective range of aimed shooting at a chest target is stated to be up to 600 meters, suppression shooting (at a height target) is up to 800 meters.
The Heckler-Koch HK G28 sniper rifle uses gas-operated automatics with a short stroke of the gas piston and a rotary bolt. The two-position gas regulator ensures reliable operation of the weapon both in normal mode and with the use of a shot silencer. The trigger mechanism provides only single fire. The rifle receiver consists of two halves - the upper steel and the lower aluminum alloy. The barrel is cantilevered inside the forend. Cartridges are fed from detachable box magazines with a capacity of 10 or 20 rounds.
The HK G28 rifle can currently be used in two configurations, changeable in the conditions of a military base - “standard” and “patrol”. The standard configuration of the HK G28 rifle includes an extended forend, a telescopic adjustable buttstock with a cheekpiece, a folding bipod, as well as a Schmidt & Bender PMII 3-20×50 optical sight and a laser rangefinder mounted on top of it. The patrol configuration makes it possible to lighten the weapon for use in foot raids, for which the rifle is equipped with a shortened and lightweight forend, a lightweight adjustable buttstock without a cheekpiece and a Schmidt & Bender PMII 1-8×24 sight. Additionally, night sights of various types and laser target designators can be installed on the rifle.
Specifying an intermediate position on milling machines
The intermediate position is indicated by one or more position words (X, Y or Z) after G28. If the machine is in absolute mode, these position coordinates refer to program zero (part zero). In relative mode, the coordinates are relative to the current position of the tool. Here are some examples:
Move straight to the starting position
G91 G28 X0 Y0 Z0
In this case, we are telling the machine that the increment position is at 0, 0, 0 relative to the tool position. Since he thinks he is already in the intermediate position, this version essentially forces the intermediate position to be ignored and we get a coordinated movement straight to the starting position.
Move straight for some distance, then return to the starting position.
G91 G28 X0 Y0 Z4.0
This option tells G28 that the intermediate position is 4mm above the current tool position, hence the machine moves 4mm before heading straight from there to the home position. The likelihood of colliding with some faulty fixture or part of the workpiece is much less likely than simply commanding it to move straight to its original position.
Beware of absolute mode!
You'll notice that the examples starting with G91 put the machine in relative mode. In absolute mode, the intermediate point is counted from the part zero. It is really difficult to determine a safe intermediate point in absolute mode, whereas it is quite easy to use relative mode with X0 Y0 Zn to safely jump to an intermediate position that is directly up from the current tool position.
G28 on lathes
Same idea, but we have a slightly different coordinate system for working on a turning center or CNC lathe.
Let's say we use the letters U and W to represent extra moves.
G28 W0 is an analogue of G91 G28 Z0 on a router. Therefore, the tool only moves in the X axis (since the incremental movement in the Z axis is 0), and this is the intermediate point. It follows that with the remaining movement along Z.
For most turning operations, it is even more important to be aware of the intermediate point, since collisions with the turret or group tools can easily occur if you are not careful.
What does G28 do to return to the original position?
G28 G-Code is one of those weird g-codes that you don't use very often, but sometimes it can be very handy. Its function is to return the machine to its original position, sometimes called the zero position. The zero return position is where most programs start, most machines go to this position when you manually return or reference the machine, and it is the home or zero position for calculating fixture offsets for cutters and geometry offsets for lathes.
Typically G28 allows you to move through an intermediate position. The movement to the home position is performed at the threshold (G0), and the intermediate position is used to avoid collisions along the way. On many machines, if you have Single Block mode enabled, you press the Cycle Start button twice - once to go to the intermediate position, and once to finish in the starting position.
