Drones have come to define the war in Ukraine with both sides making prolific use of the them for observation and ordnance delivery. Both sides have struggled to find adequate countermeasures for the drone threat with everything from fishing nets to anti-drone guns and from cope cages to complex electronic warfare jammers to disrupt UAV frequencies over larger areas.

The threat to individual soldiers has become increasingly serious with many units resorting to pressing sporting shotguns into service. However, not every combatant can carry a shotgun and a number of companies, engineers and fabricators have turned their attention to providing soldiers with a cheap, mass manufacturable, and effective weapon which can be issued to individual soldiers en masse.

In this article/video we’ll look at one of these efforts from a Russian company Ingra (ИНГРА). Ingra have developed an adaptor that converts a GP-25, 40mm under barrel grenade launcher, into a single-shot 12ga shotgun. On 13 April, Ingra announced [machine translated]:

“Friends, the INGRA company has created a new, unparalleled device ROSYANKA [Sundew] for the destruction of quadrocopters. The testing stage has been completed. ROSYANKA changes the caliber of the underbarrel grenade launcher to fire a 12-gauge hunting cartridge with an effective range of 15-30 meters. The tests carried out showed the reliability, safety and efficiency of the device. We have reached the next stage, which is the production of a pre-production batch for testing by the troops. Our task is to fill the troops with the ROSYANKA product in a short time.“

Later the same day they shared their first videos demonstrating the adaptor in action. In the first video the adaptor is shown being loaded with a 12ga cartridge and then inserted into a GP-25, just as a grenade would be. A second short video shows the adapter being used to shoot down a commercial quadcopter drone.

On their telegram channel the company posted a pair of photographs showing targets shot with an adapter at 30 metres. They claim 5mm of penetration but do not mention the length of the adapter’s barrel. From one of the photographs Ingra shared it appears that the ROSYANKA was developed in three barrel lengths, estimated to range between 2 and 5 inches in length.

On around the 5 May, the company released a slicker video demonstrating the adapter. The design appears simple, it has interfaces that allow it to be loaded and held in the GP-25s barrel which align the cartridge, which is loaded into the adaptor’s breech, with the GP-25’s firing pin. To unload the adaptor it has to be released from the launcher by depressing the grenade release catch, then the spent case needs to be extracted from the adaptor and a new cartridge loaded. The video also shows that a rear sight adapter is fitted to aid aiming the weapon.

On the 10 May I spoke to one of the company’s representatives, before the adaptor had been launched on company’s website, he explained that would be available soon and that it would cost around 12,000 rubles ($130). On the 14 May, the adaptor was launched on Ingra’s website at a lower than expected cost of 9,300 Rubles or US$102. The adapter is currently listed as unavailable on Ingra’s website but posts on the company’s social media urge interested parties to contact them directly to order.

In a video, shared on the 13 May, Ingra demonstrated the operation of the adaptor and also noted that it is compatible with GP-25, GP-30 and GP-34 pattern grenade launchers. Ingra’s website provides some specifications and confirms that the adapter is only available in one barrel length, of the three previously shown. The adapter is 250mm/9.8in long and weighs in at 340g/12oz. The manufacturer states is has an effective range of between 15 and 35 metres (50-115 feet) against a target with a 500mm/19.6in cross section. The adaptor can be used with 2 3/4 and 3in loads and has a warranty for up to 100 rounds of the Siberia 32g No.3 12ga which is Ingra;s recommend load. The adaptor comes with instructions, a rear sight adapter and a small pouch.

On the 16 May, Ingra shared another range video featuring a Russian combatant trying out the Rosyanka adaptor against floating balloons. The adaptor is being used in a GP-25 mounted on an AKMS with a PBS-1 suppressor. The combatant testing the adaptor notes [his comments were machine translated] the importance of seating the cartridge fully in the breech and keeping your hands clear of the muzzle in case of accidental discharge. He suggests having the GP-25 on safe to avoid an accidental discharge, hinting that one may have occurred earlier. He also demonstrates using a rod to push the spent cartridge case out of the adaptor’s breech.

Now that the adaptors are available it remains to be seen if we and when we’ll see them in use in the field with Russian troops. The system is clearly well thought out, simple to manufacture and potentially fairly effective at under 40 metres. It adapts a readily available infantry weapon to a pressing new role and may also have some close quarter anti-personnel applications.

It undoubtedly provides the operator with a means of engaging a drone but it also has drawbacks. The reloading process is comparatively slow meaning that the user is likely to only have one chance to engage a drone if it is one of the faster FPV drones and is unlikely to otherwise match a conventional shotgun in terms of reload times when engaging drones engaged in munitions dropping or observation. It also means the grenadier has to choose what to have loaded ready in his GP-25 in various situations. The limited availability of underbarrel grenade launchers also means that, depending on the unit, only one soldier per squad will have the ability to use the adaptor.

Update – 20/06/24:

A Russian telegram channel posted several photos of a damaged adaptor, stating [machine translated]:

“The first test was not successful; during the first shot, the skirt of the cartridge was torn off (it remained in the GP25, the barrel itself jumped out of the GP and flew away 30 meters.”

It may be that the user loaded the adapter with a cartridge not recommended by the manufacturer.

Update – 11/7/24: Photographs of a production ROSYANKA disassembled showing the threads which allows the barrel piece to screw into the wider breech section.

Update – 27/4/25:

Here we have a GP25 in a DIY standalone stock loaded with a BRT shotgun insert which was developed to engage drones.

More on these here: https://t.co/L0qWqV5J4B

The Russian telegram channels sharing the photo complain of a lack of shotguns. #Ukraine️ #SALW #UkraineRussiaWar pic.twitter.com/ZR3KqGmtYf

— Matthew Moss | The Armourer's Bench (@historicfirearm) April 27, 2025

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