The Pooshka line of sniper rifles are semi-automatic, low-recoil rifles. Compared to other sniper rifles they are about average and sport overall excellent stats without having any glaring weaknesses. While not as potent as Jakobs sniper rifles, the Pooshka boasts low recoil and an average-sized magazine. The rifles are often very accurate and are capable of firing several shots at a target without having to recover from recoil.
In keeping with Vladof's use of Nadsat in their naming conventions, the term "púška", or пушка, is Russian for (literal) "cannon", or (slang) "gun". The term was anglicized to "pooshka" in A Clockwork Orange, meaning "gun".
In Russian localization this name was changed to "tsar" (rus. царь) to keep masculine gender in names and prefixes of items, which is also might be a reference to Tsar Cannon.
The caption given is from the Skold vs. KMFDM song "Gromky". It means "Gun to the head, louder, louder."