Russian Company Develops Polymer PK Belts

In previous videos we’ve looked at Ukrainian efforts to manufacture polymer belts for PK-pattern general purpose machine guns. These were developed by Ukrainian company RAROG who has been selling them since the summer of 2022. Now PUFGUN, a Russian company has also developed a polymer PK belt.

Traditionally, the 7.62x54mmR belts used by the PK series of guns have been made from metal and are non-disintegrating, meaning they remain linked together after they’ve been used, while NATO machine guns tend to use disintegrating belts that fall apart once the rounds held in them have been fired.

On 3 September, PUFGUN announced the introduction of the new disintegrating belts, explaining some of their features:

“The tape is made of high-strength polymer – a light and durable material. 3 times lighter than metal analogues. The total weight of the package for 100 links is 220g
Due to the physical properties of the polymer, the loading of the PUFGUN loose belt is carried out faster than that of a metal belt.
Maintains functionality in temperature conditions from -40C to +70C.
Not subject to corrosion, does not require special conditions for long-term storage.”

Packs of 100 links are being sold for 548 Rubles or $5.75 on PUFGUN’s website.

PUFGUN shared a pair of photos, on 10 September, comparing the weight of a loaded traditional metal belt with one of their non-disintegrating belts, with the metal belt weighing 2.8kgs while the polymer belt weighed in at 2.37kgs. In the caption they claim that the photos were taken by Russian special forces unit Grom. OSN “Thunder”, who they state has been testing the belts since late August. The post claims Grom’s first impression was ‘quite good’. The post on PUFGUN’s telegram has since been deleted.

On 14 September a video showcasing the belts was posted by Mikha Mikhalych, a Russian gun content-creator, reviewing the belts. In the video two types of belt are featured; the disintegrating belt and a non-disintegrating one. The video also features a polymer belt box developed by PUFGUN, which is said to weigh around 150g. Combining the box with the polymer belts appears to be a meaningful push towards reducing the weight of the PK’s ammunition carriage system.

On 26 September, PUFGUN announced the non-disintegrating polymer belts on their social media. These belts share the same technical specifications as the disintegrating belts but notable are made from a clear plastic rather than a black plastic. While these have previously appeared in the earlier video they are not, at the time of publication, available for purchase on the company’s site. It appears that the links will be sold in packs of 100, with a starter tab and four disintegrating connector links which allows 25-round belts to be linked together.

On 9 October, PUFGUN shared a short clip showing their non-disintegrating belt being loaded by an Rakov belt-filling machine. This video was made in collaboration with ‘Granit’, a Russian living history group which appears to have links to the Russian military. Granit also shared their own longer video showing the belts being used in a variety of old and new Russian machine guns ranging from a vintage SG-43 to the latest PK variant the 6P41M.

Much like the Ukrainian KS-122 polymer belts from RAROG, the PUFGUN belts do significantly reduce the weight on the gun itself and more broadly for transporting ready ammunition. PUFGUN have sought to address the need for both disintegrating belts, useful for troops on the move that don’t want to be encumbered by trailing empty belts, while the non-disintegrating belts are more easily reloaded and better suited to use in vehicles or static positions. It’s interesting to see both sides commercially developing polymer belts to address a perceived need shared by both sides.


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Russia’s RGL Север 1

In early March we looked at the Black Storm Defender, a Ukrainian conversion kit, which turned GP-25 under-barrel grenade launchers into standalone weapons. Since then further research has discovered a very similar conversion design originating from Russia. Developed by a company called RGL (redgreenlight.ru). RGL have developed a number of products including a sight mount for RPG/RPO pattern shoulder-fired launchers and a small light which can illuminate turrets on optics for use in lowlight conditions. They developed their stock for the GP25 and GP34 in 2019, with refinements in 2022. It was reportedly developed independently of the Black Storm Defender – with both companies developing very similar products.

Comparison between Север 1 (top) & Blackstorm Defender (bottom)

RGL’s website has some specs on their system – the Север 1, noting its length is 480mm and its weight is ‘no more 1100g’. The stock adapter is priced at 17,000 Russian Ruble (or around $220). 

Photos of the Север 1 with GP-25 fitted and disassembled (via RGL)

So similar are the two designs that images at 5:21 and a clip at 6:55 actually show Север 1s rather than Defenders. A Wagner-affiliated Telegram channel posted the photo below, with the caption: “For those who want to order – mid-May production time, place an order in advance.”

An RGL Север 1 fitted with a TAG-35, an airsoft clone of the GP-34 grenade launcher (via social media)

The key differences between the two appear to be a different kind of butt pad, the positioning of the sling loops, some machining on the extension which attaches to the launcher and most fundamentally a reversal of which parts of the stock telescope. On the Defender the rear section telescopes inside the front while on the Север the front portion appears to telescope inside the rear section. The Север 1 does not appear to come with a frontgrip or a grip extension. The Север 1 has been seen in use in Ukraine with Russian combatants.

Update – 14/07/23: Russian military ‘influencer’ Razvedos shared several photos of the RGL Север 1 standalone stock for GP series underbarrel grenade launchers. Razvedos recommended it saying: “I recommend the best solution in this niche today from RGL.”


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Bibliography:

Black Storm Defender, Black Storm, (source)

RGL Север 1, RGL, (source)

Thanks to Abraxas Spa for their help with this video.

Mk153 SMAW In Ukraine

Recent imagery confirms the presence of the Mk153 SMAW in Ukraine. In the last couple of months there have been sightings of the Mk153 in use at the front and at a Ukrainian Armed Forces training ground. The Mk153 is a shoulder-fired rocket launcher capable of engaging structures and armoured vehicles.

The Mk153’s cousin munition – the one-shot, disposable M141 SMAW-D has been seen in theatre in fairly small numbers since February 2022. We have an earlier article/video looking at the SMAW-D, check that out if you haven’t already.

The Mk153 is primarily used by the USMC and was developed from the Israeli IMI B-300 and introduced in the mid-1980s. So what actually is a Mk153? The USMC describes the SMAW as: 

“a one-man operable, 83 mm smooth bore, shoulder-fired, rocket launcher with a spotting rifle attached to the right side of the launcher tube. The encased rocket is fitted into the aft end of the launcher, and the fiberglass encasement is discarded after use. The spotting rifle, which improves firstround hit probability, is fed 9 mm tracers by a magazine, which holds six rounds. The 9 mm round is ballistically matched to the 83mm rocket.”

The SMAW (or Shoulder-Launched Multi-Purpose Assault Weapon-Disposable) can fire Encased High-Explosive, Dual Mode (HEDM) and Encased High-Explosive, Anti-Armor (HEAA) rockets. The HEDM is an anti-structure and anti-light armour munition with a warhead containing 2.4 pounds Aluminized Comp A-3 capable of penetrating 200mm (8 in) of concrete. The HEDM has a maximum effective range of 250m. The HEAA is a dedicated anti-armour round able to penetrate up to 600mm (23.6in) of rolled homogeneous steel, with a maximum effective range of 500m. It uses a shaped charge warhead with 1.89 lbs Octol explosive. The Novel Explosive (SMAW-NE) has a 4lbs enhanced-blast warhead, containing PBXN-113, designed for bunker busting which the USMC manual describes as “designed to provide enhanced-blast lethality to defeat personnel in reinforced structures and caves.”

Mk153 in Ukraine (via Social Media)

The Mk153 has iron sights and a Mk42 3.8× magnified optic and a 9mm spotting rifle on the side of the launch unit. This spotting rifle fires tracer rounds which match the rocket’s ballistics and can help range the target and aid the operator in applying the right hold for the target. The tracer cartridge that contains a 9mm jacketed bullet with an aft burning .22 calibre tracer element. Spotting rifle magazines for the rockets are supplied on the outside of the rocket carry tube end cap.

The first sighting of a Mk153 in the field came from some B roll footage of a UK Channel 4 News report published on 28 February. It showed men of the Ukrainian 68th Jager Brigade on the front-line near Vuhledar. Several soldiers are seen preparing a Mk153 to fire.

On 17 March a video featuring a Mk153 SMAW being fired at a range was shared on Telegram. It shows a SMAW being fired and a pile of spent tubes and unfired rockets on the ground. The fired and unfired rockets all appear to have yellow bands indicating high explosive munitions – the Mk153’s practice round has a brown band. Sadly, we can’t  make out the other markings which would indicate the type of rounds being fired.

Mk153 in Ukraine (via Social Media)

At the end of March another video of Ukrainian soldiers preparing a Mk153 for firing was shared again at the range. The video gives us the best close up of the launcher in theatre so far and shows not one but two launch units. We get a good look at the tube and the launch unit’s spotting gun on the right hand side. This video shows the weapon being prepared to fire, the rocket is inserted into the launcher and rotated clockwise a quarter-turn to lock it in place before the Ukrainian soldier fires at a target down range.  

Another interesting detail we can see is the white paper hang ing from the rocket. This is a humidity indicator which allows quick visual inspection to see if the rocket might have been compromised by moisture. The indicator on this rocket appears to have pink in all three of its indicators circles, meaning the munition might be compromised, in USMC service this would mean the rocket needs to be returned to the ammunition supply point. Despite this the rocket appears to fire normally and detonate down range. It’s worth noting that the launch unit isn’t fitted with an optic in any of the clips.

Update – 24/05/23: An additional clip of a SMAW being fired in an urban environment, perhaps during the defence of Bakhmut, date unknown.

Update – 25/06/23: A photograph of a Ukrainian combatant with a SMAW share online, June 2023

Update – 25/07/23: A photograph originally posted in December 2022 showing a SMAW launcher with rockets in the background.

Update08/08/23: Short video of a Ukrainian combatant firing a Mk153 at a distant (judging by elevation) target.

Update – 3/9/23: An interesting video showing a phone mounted onto a SMAW MK153, this allows a clinometer app to be used to enable the SMAW to be used in the in-direct role, angling the weapon upwards.

Update – 24/09/23: Bravo Rapid Reaction Group training with SMAW Mk153 at the range.

Update – 3/4/23: A combatant from Ukraine’s 3rd Assault Brigade shared video on 27 March of a firing of a SMAW Mk153 at a range, filming date unconfirmed.

Mk153 Specifications (per USMC):

Rocket Launcher
Length29.9 inches
Weight16.9 pounds
Encased rocket (as carried)
Length27.3 inches
Weight12.7 pounds
Caliber83mm
Weapon Ready to Fire
Length53.1 inches
Weight29.0 pounds
Range
Maximum effective (HEDM)250m
Maximum effective (HEAA)500m
Time of flight to 250m 1.6 sec

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Bibliography

Ukraine War: on the front lines with the 68th Brigade, C4 News, (source)

Introduction to Crew Served Weapons, USMC, (source)

Launcher, Assault Rocket, 83mm (SMAW) MK153 Mod 0, USMC, (source)