Has anyone ever heard of a BRNO made sniper from the late 80s - early 90s?

Not sure what you're asking. You are correct, the top is a common Brno Sport 537 and the bottom is the Vz. 54/91 sniper.

BRNO CZ 537 for sale on Simpsons for $695

I was going to suggest you reach out to @buffalowinter but he found you.

Has anyone ever heard of a BRNO made sniper from the late 80s - early 90s?​

Click to expand...

I have never heard of a BRNO sniper rifle. Based on what I have read, they reportedly made sporting rifles during that era.
The two military sniper rifles used by Czechoslovakia include the VZ.54 followed by the Russian Dragnov, which was presumably used up through the 1980s and at least early 1990s (before they broke free of the Russian/Soviet subjugation). Could BRNO have made some prototype sniper rifles after 1990 when it was privatized, for the military or law enforcement to evaluate? Yes, that is theoretically possible, but I have never seen anything in my reference books that referred to a BRNO-made military sniper rifle. That's all I know.

Also following World War II, the factory was nationalized and became known as Zbrojovka Brno. It was subject to socialist rule until 1989, but most of its firearms production was redirected to sporting arms that garnered a reputation for being dependable and rugged. These rifles made their way throughout Europe and became popular throughout Africa.

The Brno factory was privatized in 1990 following the end of the Warsaw Pact. On January 1, 1993, Czechoslovakia separated into the Czech Republic and Slovakia as they are known today. In 2008, Česká zbrojovka (CZ) a.s. Uherský Brod acquired Zbrojovka Brno and continued making high-grade single shot and double rifles, combination guns, as well as over/under shotguns for competition and hunting. Though most of us are familiar with CZ firearms, many have never heard of the Brno name due to the small numbers of firearms in U.S. circulation.

Click to expand...

Czech vz.54 sniper

Czech vz.54 sniper was a modified Mosin-Nagant, equipped with a 2.5x Meopta scope. They were made from 1954 to 1957 and served until replaced by the Dragunov

www.forgottenweapons.com

vz.54​

While Czechoslovakia was a part of the eastern bloc, it did a pretty thorough job of developing its own weapons rather than use standard Russian designs. For example, the vz52 pistol, vz52, 52/57, and 58 rifles, the uk59 light machine gun, and more. Well, their military sniper rifle was closer to Russian origin, but still not the same.

The vz.54 sniper was made from 1954 until 1957, and served for many years, until replaced by the Dragunov. It was at heart a Mosin-Nagant rifle, but outfitted with a semi-pistol-grip stock, distinctive Czech scope mount, and a few other features. It was chambered for the standard 7.62x54R cartridge, and was capable of excellent accuracy.

....that fact that Ian from Forgotten Weapons didn't mention BRNO in the above description sort-of supports my impression that Czech company made only sporting arms back then. My 2cts.