Can't speak for Moldova or Austria, but I would not call Switzerland's gun laws liberal.
They are VERY strict. Gun ownership rates are high, but there are tons of restrictions and licensing requirements on ownership and sale of guns there. The country is proof that having a strong regulatory structure does not necessarily prevent gun ownership and should absolutely be considered a model for where the US regulator environment should be moving (universal registration including 2nd hand sales, full license checks for all purchases including ammo, effective bans on large categories of weapons, mandatory training, and the like).
People who love "gun rights" always cite Switzerland without even doing the most basic Wikipedia-level research on it.