Russo-Ukrainian War: The AHS Krab 155mm SPG

Source: Ministry of Defense of Ukraine

     In all, the Ukrainian Army obtained a total of 108 examples of the vehicle shown here, the 48-ton Polish AHS Krab 155mm Self-Propelled Gun (SPG). As part of Poland's military aid to Ukraine, the country provided the first 18 vehicles which were received by the close of 2022. The remainder were obtained via purchase orders with Poland. The ArmatoHaubica Samobieżna (AHS; Self-Propelled Gun-Howitzer) Krab (meaning “Crab“ in Polish) is a joint development by the Polish company Huta Stalowa Wota (HSW), the British firm BAE Systems, and the South Korean entity Samsung Techwin. Work began on the Krab in 1997 and it finally entered production in 2016 with Polish artillery units receiving the Krab soon after.

     Samsung Techwin's contribution to the Krab is the PK9 chassis which is a variant of the chassis used by the South Korean K9 Thunder 155mm Self-Propelled Howitzer (SPH). Power comes from a MTU Friedrichshafen GmbH built MT881 Ka-500 8-cylinder, water-cooled diesel engine that develops 1,000 horsepower. This is paired to a Allison X1100-5A3 transmission with a 6-speed gearbox (4 forward, 2 reverse gears). On roads, the Krab can top out at 37 miles per hour while offroad, in favorable terrain, up to 19 miles per hour can be achieved. Enough onboard diesel fuel is carried to provide for a maximum operational range of 250 miles. The all-welded chassis uses tempered steel armor plating produced by the Australian company Bisalloy with a maximum thickness of 19mm. This provides the approximate equivalent to STANAG 4569 Level 4 protection which means the armor is capable of withstanding up to and including 14.5x114mm API (Armor Piercing Incendiary) ammunition at a minimum distance of 200 meters as well as shrug off 155mm artillery shell fragments as close as 25 meters. Of the five man crew, only the driver sits within the hull.

     The Krab's turret is much the same as that used on the British AS-90 155mm SPH which had been designed by Vickers Shipbuilding & Engineering, a division of BAE Systems. Like the hull, the turret supports the same Bisalloy armor and offers the identical STANAG 4569 Level 4 protection for the four men within. Situated within the turret is a HSW license built 155mm L/52 gun-howitzer. The gun mount provides for up to 70 degrees of elevation and 3.5 degrees of gun depression while the turret can fully traverse 360 degrees. The gun-howitzer uses a sliding block breech and there is a power loader which permits a burst fire rate of 3 rounds in only ten seconds. For three minutes, the Krab can fire 6 rounds for each of those minutes. A sustained fire rate is 2 rounds per minute. All told, the Krab holds 29 projectiles and 28 powder charges in the turret while the hull holds an additional 11 projectiles and 20 charges. The Krab can utilize any NATO compliant 155mm projectile to include the M982 Excalibur extended range, guided projectile. The latter can attain a range of 25 miles. A typical base bleed projectile can reach a maximum range of 19 miles. The gun-howitzer enjoys the benefit of a ZZKO Topaz FCS (Fire Control System) which consists of an automatic aiming system, ballistic computer, laser rangefinder, and both commander and gunner sights interlinked into the FCS. Outside the turret, situated on top of the gun mantlet, is a MVRS-700 SCD ballistic radar to measure the velocity of shells as they leave the barrel. In case of electrical failure, the turret can be manually traversed while the gun can also be manually elevated and depressed as well as loaded by hand. Also, should the Krab find itself in dire straits, it has a gunner's sight to allow it to engage in direct fire. For anti-air and local defense, the Krab can be fitted with a pintle mounted 12.7mm heavy machine-gun on the turret top.

     Other protective systems within the Krab include an automatic fire detection/suppression system while there is a filtered ventilation system that gives a measure of crew protection against biological, chemical, and radioactive substances and agents. The Krab also utilizes the OBRA-3 SSP-1 warning and self-defense system. This consists of external sensors which detect lasers that are “painting” the Krab. Such lasers are often utilized by anti-tank missile systems. The OBRA-3 will warn the crew and designate the direction the laser is coming from. In addition, the OBRA-3 is tied into the Krab's two banks of 81mm dischargers, each bank with four launch tubes. These banks are located on the turret front, one bank on each side of the gun barrel. The OBRA-3 can be set to automatically launch smoke grenades to obscure the Krab and interfere with the laser designator or if desired, the commander can manually trigger the grenades.

     Other systems include a FONET internal communication system for the crew (made by the WB Group), a RRC 9311AP RF digital radio station, FIN 311OL land navigation system, DD-9620 terminal for providing targeting data, GPS system, day/night sights for the commander and driver, and a 5.5 kilowatt output auxiliary generator (for powering the Krab with the engine off).

     The Krab shown here belongs to Operational Strategic Group Dnipro, likely within Tactical Group Kharkiv or Tactical Group Starobilsk which are the group's two subordinate units. The crew has added metal mesh anti-drone screens to the turret, decking, and hull sides. Cutouts have been made in the frontal turret screens to accommodate the 81mm grenade launchers. The Krab looks to have kept its original Polish Army camouflage paint pattern.

     As of September 9, 2025, the visually confirmed Ukrainian AHS Krab losses stand at 41. Of these, 35 have been destroyed beyond repair with the remaining 6 having suffered damage of varying severity.

Char B1 bis (n° 416) “Hautvillers”: Knocked Out at Stonne

Source: Reddit

     Looking at a map of France, today the village of Stonne is a tiny speck consisting of 2.77 square miles of land area and 39 residents. Yet, between May 15 and May 17, 1940, Stonne was the epicenter of a brutal see-saw battle between an ad-hoc force of French Army troops and the German Army, led by the 10th. Panzer Division along with other elements, to include the crack Infanterie-Regiment "Großdeutschland".

     While Stonne itself had absolutely no military value, the land it was situated on most certainly did. Immediately to the north of Stonne sits Mont-Dieu (God's Mountain) which is heavily wooded with only the D 30 road running through it and into Stonne. The village itself sits atop a 330 meter (1,082 foot) elevation with a very steep drop-off into the thick woods north of the village. To the east of Stonne, near the D 30 road's turn into the village, is Le Pain de Sucre (Sugarloaf) which is a conical shaped hill some 335 meters (1,099 feet) high.“Zuckerhut“ (also meaning Sugarloaf), as the point was called in German, offered an excellent observation point. The French realized that the area around Stonne was a natural obstacle to check the German advance further south and so they quickly fortified the area with pillboxes and set up barriers to slow down German troops.

     During the Battle of Stonne, the village exchanged hands seventeen times. The initial day saw elements of the 3e Division d'Infanterie Motorisée already positioned in Stonne but by 0800 hours, Stonne was in German hands, led by 1. Bataillon, Infanterie-Regiment "Großdeutschland". In the course of the day's combat, Char B1 bis tanks belonging to 3e Compagnie, 49e Bataillon de Chars, would see action against the Germans and the knocked out tank shown here was one of them. The tank, n° 416 and named “Hautvillers“, was commanded by Sous-lieutenant Jacques Klein and driven by Caporal-chef Emile Chanel. The names of the radio operator and assistant driver (who was usually a mechanic) that completed the crew are not known. The tank was received by the unit on March 25, 1940. 

     At approximately 1000 hours,“Hautvillers“ had been advancing north towards Stonne over the ground between the D 30 and D 24 roads. A Panzerkampfwagen IV, belonging to Panzer-Regiment 8, spotted the French tank and took it under fire. The Pz.IV's gunner, one Karl Koch, was able to hit “Hautvillers“ three to four times. The results of the successful engagement saw “Hautvillers“ turret jammed, the 47mm gun fitted to it bent, the right side track severed, and a non-penetrating hit on the armor near Caporal-chef Chanel's station. The spalling of the armor on the interior by the strike caused superficial injuries to Chanel and triggered a fire in the tank's electrical system. With such crippling hits, the crew abandoned the tank though all four men would later be captured by German troops. Given the photograph, it is clear the fire consumed the tank, probably causing an ammunition detonation which blew apart much of the upper hull, causing the turret to fall inward. This particular photograph was likely taken well after the battle as much of the debris following the tank's demise is no longer seen laying on the ground. Based on the many photographs taken of the tank by German soldiers, the location of the wreck may be at the intersection of Route de la Berlière (D 24) and Rue du Paquis which is located just outside Stonne proper.

     While German forces ultimately won the Battle of Stonne, the area would not be completely pacified until May 25, 1940.

Russo-Ukrainian War: The Accuracy International AXMC

Source: Ministry of Defense of Ukraine

     A sniper belonging to the 4th. Rapid Reaction Brigade “Rubizh” (“Frontier”) who looks to be equipped with a AXMC bolt-action rifle designed and built by the British company Accuracy International. The AXMC (MC standing for Multi-Caliber) is a rifle available on the open market, typically costing well over $7,500USD or more depending on the options added and what caliber is desired. The rifle finds use by military, law enforcement, and civilian sharpshooters. Of interest, the soldier is wearing the patch of the U.S. Army's 1st. Infantry Division, known as the "Big Red One".

     Ukrainian snipers are known to favor the .308 Winchester cartridge (made specifically for the civilian market) as it offers a much higher pressure and accuracy than the very similar military 7.62x51mm NATO cartridge. The .308 Winchester can attain velocities of up to 3,500 feet per second. Another benefit of having a rifle chambered for the .308 Winchester round is that the rifle can also utilize the military 7.62x51mm cartridge without any concerns. However, not all battle rifles using the 7.62x51mm cartridge can handle the .308 Winchester without risk of problems such as cartridge case rupture or splitting. In the hands of a trained sniper and the right conditions, the .308 Winchester round can hit targets out to .5 of a mile. The AXMC is also available in .300 Winchester Magnum and .338 Lapua Magnum cartridges.

     The barrel of the AXMC is made of match grade, stainless steel and uses Accuracy International's Quickloc system which permits the operator to change barrels without needing tools. The proofed steel action features a leaf spring extractor and a bolt whose handle is turned 60 degrees. The rifle has a 3-position safety along with a 2-stage trigger. From appearances, the rifle in the photograph looks to be fitted with a 27” barrel. Magazine capacity is 10 rounds.

     The AXMC utilizes a configurable pistol grip (as it is detachable and easy replaced with another style) and a buttstock which offers the ability to adjust stock length. There is also an adjustable cheek piece at the top of the stock and a rear grip along the bottom of the stock. The latter can use an optional butt spike. When not needed, the stock can fold forward, resting along the right side of the rifle.

     It is difficult to say what suppressor is fitted but most AX model rifles are built to accept suppressors made by the Swiss company B&T AG. Also, the AXMC has a top Picatinny rail (MIL-STD 1913). Additional rails can be added to the sides and bottom of the forend using Accuracy International's KeySlot™ system and the soldier here has added a bottom rail which supports a folding bipod. The scope mounted atop the rifle appears to be a Nightforce Optics ATACR series rifle scope.

Russo-Ukrainian War: The Zlin Z-137T Agro-Turbo

Source: Reddit

     Anyone that monitors news feeds and social media images and videos of the Russo-Ukrainian War will often notice that much of the land in which engagements happen is on flat and open fields punctuated by thin lines of trees. There is good reason for that and why Ukraine is called the “Breadbasket of Europe”; some 71% of Ukraine's entire land mass is agricultural and Ukraine is one of the top three exporters of grain such as wheat. As such, it should not be surprising that crop dusting aircraft would be in use to service farmers and their fields. Except, in this instance, insects are not the targets but instead, Russian drones are. Some bloggers have nicknamed the aircraft shown here “Stuka” after the Junkers Ju 87 dive bomber of World War Two fame (or infamy depending on one's outlook). While there is a very superficial Ju 87 resemblance based on the aircraft's angle in this smartphone video screen capture, the aircraft is in actuality a Zlin Z-137T Agro-Turbo agricultural aircraft.

     Built by the Czech company Zlin Aircraft Otrokovice (formally Moravan Otrokovice), the Z-137T is derived from the earlier Zlin Z-37 Čmelák (“Bumblebee”). The prototype first flew in 1981 with production commencing in 1998 and when manufacturing ceased in 2007, a total of 56 aircraft were built (of which five were prototypes). A factory fresh Z-137T in 1998 carried a price tag of $230,000USD fully equipped for agricultural duty.

     The Z-137T is a single-seat aircraft with maximum agricultural work take-off weight of 5,566 pounds. Length is 34.3 feet, height of 11.5 feet, a wingspan of 44.7 feet, and a wing area of 256 square feet. Power comes from a Motorlet Walter M601Z reverse-flow, axial-centrifugal turboprop engine which develops 490 shaft horsepower. The engine drives a three-bladed, constant-speed propeller built by Avia. At an altitude of 500 meters, the maximum cruise speed is 157 miles per hour while the absolute maximum speed of the Z-137T is 177 miles per hour. Climb rate is 827 feet per minute. The service ceiling is 18,054 feet and with 92.5 gallons of onboard fuel, the maximum range is 216 miles. The Z-137T needs 1,905 feet of runway for take-off and 2,365 feet for landing.

     The Z-137T has a auxiliary 30 kilowatt drive system which operates the agricultural attachments such as chemical spraying gear or a rotary duster for dry fertilizers or pesticides. The former has a spray swath width of 131 feet while the duster has a 98 foot spread width.

     Of course, this modified Z-137T has replaced any agricultural apparatus for missile pylons. The Z-137T does have four hardpoints, two per wing, which are normally used for external fuel tanks to increase the aircraft's range. Here, the two inner hardpoints are fitted with fuel tanks (which, as a note, cannot be released by the pilot) while on each outer hardpoint is a single Vympel R-73 (NATO reporting name AA-11 Archer) short-range, infrared homing air-to-air missile (AAM). As Ukraine has a sizable stockpile of R-73 missiles, many of them have been repurposed for use as surface-to-air missiles (SAMs) and, as indicated here, allocated to drone-hunting aircraft. The Z-137T, because of its speed, is well suited to drone interdiction in comparison to jet fighters. The typical Geran-2 drone has a maximum speed of 115 miles per hour and so the Z-137T can catch up to them even at cruise speed. It can also launch the R-73 towards the drone without the worry of overtaking the target and risking getting caught in any detonation of the drone's warhead. This is very much a risk for much faster moving jet fighters. Also, the slower close rate of the Z-137T against a drone means a longer time for the pilot to line up the target and achieve the best chance for a missile lock. Finally, aircraft such as the Z-137T are optimized for low altitude flight and can better operate at lower altitudes. The R-73, when used by fighter aircraft, is tied into the pilot's helmet-mounted sight. With but a glance to the target, the information is sent to the missile prior to launch. It is not known if the Z-137T's pilot has a HMS or if targeting is dependent on getting close enough to the targeted drone for the R-73's seeker to pick up the heat signature. The R-73 has a top speed of Mach 2.5 thanks to its solid-fuel rocket engine and it can carry its 16 pound warhead out to a range of 19 miles.

Jagdtigers of 2/s.Pz.Jg.Abt.512: Demolitioned Near Letmathe

Source: Author's collection.

     The remains of two Jagdtigers of 2nd. Kompanie, Schwere Panzerjäger Abteilung 512 (2/s.Pz.Jg.Abt.512) sit alongside a road near the German town of Letmathe. On April 11, 1945, 2/s.Pz.Jg.Abt.512, commanded by Hauptmann Walter Scherf, was part of Kampfgruppe (Battle Group) Ernst and set up in hidden positions to check U.S. advances to the Ruhr River. That day, the Jagdtigers fired high explosive ammunition out to 3 miles and the group was able to cause enough havoc to force the U.S. forces to retreat. Despite the victory, 2/s.Pz.Jg.Abt.512 was ordered to withdraw and so during the night, Scherf positioned his Jagdtigers on high ground outside the village of Kalthof. The next day, the Jagdtigers shot up U.S. tanks, again halting the advance of U.S. forces. Nevertheless, 2/s.Pz.Jg.Abt.512 continued to withdraw and by April 14, was in the village of Ergste. 

     The Jagdtigers were situated in a wooded area near Letmathe where mechanics worked to effect repairs. Scherf could see that his men had no fight left and when word came that 1/s.Pz.Jg.Abt.512 was all but finished, that was the final straw. 2/s.Pz.Jg.Abt.512 was ordered to destroy their Jagdtigers and on April 15, 1945, 2/s.Pz.Jg.Abt.512 surrendered. 

     Thus, when the Allies passed through, they found these two Jagdtigers. The second one is difficult to make out but it is parked immediately behind the Jagdtiger in the foreground and it is believed that this Jagdtiger had towed the other after it suffered a mechanical breakdown.