One of the main components of Russia's aerial raids against Ukrainian infrastructure (power plants, factories, electrical distribution centers, etc.) and civilian targets is the Geran-2, the Russian version of the Iranian HESA Shahed 136 loitering munition. The Geran-2 is relatively cheap at a single unit cost of no more than $80,000 for the current model. As such, they can be launched enmasse (and usually in combination with other weapons, such as cruise missiles) in order to overwhelm Ukrainian defenses and ensure successful strikes. A component of Ukrainian air defense comprises rapid response anti-drone units which, upon receiving the flight paths for Russian drones, deploy in or near the flight paths to engage them with an array of light, medium, and heavy machine-guns mounted on trucks. Given the 115 miles per hour top speed of a Geran-2, utilizing machine-guns to shoot down the drones is a viable (and cost effective) method. In some cases, static anti-drone defenses are set up around valuable targets or as a secondary layer of defense against any drones which get through the mobile anti-drone units as illustrated here. One of the techniques to increase the chances of a successful hit against drones is to simply throw as many bullets as possible into the path of the drone and hope one or more of the rounds strike the drone to such a degree as to down it. And so this anti-drone mount holds three RPK-74 light machine-guns.
Introduced into Soviet Army service in 1974, the RPK-74 is chambered for the Soviet 5.45x39mm round and all three of the RPK-74 weapons are secured to a metal frame which permits a high degree of elevation (very useful for anti-air duties) which in turn is fitted to a heavy tripod. To the right of the central RPK-74 is a shoulder stock which the gunner can use to stabilize the mount, assist in absorbing recoil, and guide the mount when traversing and elevating. Below the shoulder stock is a trigger which permits the gunner to fire all three RPK-74s at the same time. Between the center and outer right RPK-74 is a ring sight and given the electrical cord, it is possible that a night sight or a spotlight is connected to the gun mount to aid the gunner in acquiring his target. The basket, though empty, is likely for keeping additional magazines to speed reloading. Speaking of magazines, the RPK-74 can utilize either a 30- or 45-round box magazine.
Using a gas operated, rotating closed bolt action, the RPK-74 is capable of firing up to 600 rounds per minute. Assuming the 45-round magazine, a single RPK-74 can empty the magazine in 3.5 seconds. So, with three RPK-74 weapons firing in unison, this means the gunner can send 135 rounds towards the target in those same 3.5 seconds. With a muzzle velocity of 3,149 feet per second, the 5.45x39mm round has an effective range of .6 of a mile (1,000 meters) if using saturation fire. The bullet itself can travel as far as 2 miles but accuracy is about nil at such a distance. Given the short effective range, this particular anti-drone weapon arrangement relies on the Geran-2 to be flying at low altitude (it can fly as low as 197 feet) and close to the gun emplacement for a realistic chance of the gunner being successful in his engagement. Otherwise, it really does become a “fill the sky with lead” in the direction of the drone and hope to get a very lucky hit. Fortunately, some Geran-2 do fly at low altitudes to make detection more difficult and to lower the window of time the defenders have to engage before the drones move out of range or lines of sight get blocked by terrain and terrain features.
