Protip: you can tell the S-54 apart from the S-55 by the lack of muzzle break, lack of IR lamp, taller loader's hatch (for the removed 12.7mm anti-aircraft machine gun mount), and mushroom-shaped armor dome for the ventilator fan.
![](https://blockheads1.nyc3.digitaloceanspaces.com/creations/7200/F2uDQMFJIGRyXEnAKo0MM0AqlHVKvR-metaUy01NC5wbmc%3D-.png)
![](https://blockheads1.nyc3.digitaloceanspaces.com/creations/7201/GuijR5wqNyRylsx15CynyOXsyFH3gs-metaUy01NCBzaWRlLnBuZw%3D%3D-.png)
Protip: you can tell the S-54 apart from the S-55 by the lack of muzzle break, lack of IR lamp, taller loader's hatch (for the removed 12.7mm anti-aircraft machine gun mount), and mushroom-shaped armor dome for the ventilator fan.