France makes what is arguably the toughest, most durable, and out-of-the-box accurate carry revolver, the MR73.
Italy makes the best semi-auto tactical shotgun, the Benelli in its various iterations, and are at the top in the competition shotguns with the Perazzi and others
Switzerland makes the SIG P210, is the birthplace of the SIG P2xx series, and produced the most accurate military rifles spanning from pre-WWII to date. It's the only country that managed to produce an AK-based military rifle that you can take for competition right out of the rack, the SIG 550.
The Czechs produce the CZ line, with their pistols universally recognized as top contenders in quality, reliability and ergonomics, and their utterly reliable rifles being the most common bolt action used by professional hunters in Africa.
The Finns produce the Sako, one heck of no-nonsense and reliable hunting rifle.
Belgium has master armourers in Liège, produces the FN, and have been producing the best Browning guns for decades.
Austria has a whole master craftsmen industry in Ferlach. You may not like the style, but they produce absolutely outstanding break-open rifles, bolt actions, and multi-barreled designs.
Then you have the Brits, the Germans, the Swedes, and a handful of other countries who have top-notch manufacturers, some being mere artisans.
I certainly forget many, but these are the ones that come to mind when you think about "a really good, well made gun" at the very top of its category.