Russsian 100mm KS-19 Still Holding the Line in Ukraine

[M8owner]

That appears to be a UOF-412 HE shell. This weapon is a Soviet antiaircraft gun with the same ammo as the T-55 tank - rifled barrel.

Text from photos:

Ukrainian servicemen of the 127th Territorial Defence Brigade fire KS-19 100mm gun towards Russian positions near Kharkiv, Ukraine, Friday, May 16, 2025. | Yevhen Titov

A Ukrainian serviceman of the 127th Territorial Defence Brigade carries a shell to fire KS-19 100mm gun towards Russian positions near Kharkiv, Ukraine, Friday, May 16, 2025. | Yevhen Titov

 

[Eggburt1969]

53-UOF-412 (53-УОФ-412), shortened to UOF-412 (УОФ-412) on field and packaging markings, is the GRAU index code for the round of ammunition, not the projectile's/shell's.

The 100 mm HE (OF [ОФ]) projectile could be one of a number of Soviet-/Russian-developed models, and hence it could be one of quite a few different rounds.

Unfortunately the image is missing out of the Getty Images set (first link) and the Almay logo covers most of the projectile's field designation on the Almay image (second link).

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A Ukrainian serviceman of the 127th Territorial Defence Brigade carries a shell to fire KS-19 100mm gun towards Russian positions near Kharkiv, Ukraine, Friday, May 16, 2025. (AP Photo/Yevhen Titov Stock Photo - Alamy

Download this stock image: A Ukrainian serviceman of the 127th Territorial Defence Brigade carries a shell to fire KS-19 100mm gun towards Russian positions near Kharkiv, Ukraine, Friday, May 16, 2025. (AP Photo/Yevhen Titov) - 3BBME30 from Alamy's library of millions of high resolution stock...

www.alamy.com

As OF- (ОФ-) can however be seen, it's likely a 53-OF-412 (53-ОФ-412) projectile, and less likely to be the sintered iron-banded version, the 53-OF-412Zh (53-ОФ-412Ж).

Unfortunately, these two projectiles are sill used in quite a few rounds, but the most likely is the 53-UOF-412 round you mentioned.

Hopefully someone hasn't marked a 3OF32 (3ОФ32) GRAU Division 3 projectile incorrectly and stuck a hyphen between the OF and the 32 of the projectile's designation. If they did, then there's a load more rounds it could be.