It really depends on your definition of "quality" when it comes to weapons. You also will get mixed results, depending on what kind of weapons you're referring to, is it firearms, planes, land vehicles, naval vessels, etc.? Also, who are you comparing them to? I'm assuming you're comparing them to either the United States or the West in general.
The AK-47, Russia's most famed weapon of all time, is notoriously reliable, but also relatively inaccurate and low-range compared to direct competitors like the M16, I'm not including the M4 in this comparison because it's highly advanced compared to an AK-47 and would be more appropriate to compare to an AK-74 or Russian special forces weapons. For the record, Russia now issues AK-74 more en masse than they used to, but the AK 47 is easily the most prevalent automatic firearm in the world.
Here is a great resource on comparing the two rifles:
As far as vehicles of any kind and missiles are concerned, those are difficult to compare, and are rarely battle-tested against one another, so a lot of it is really just speculation, other than the fact that Russian weapons tend to be based upon technology that wouldn't be considered "current" in the West.
I can say that when I lived in Russia, one thing I noticed is that military bases and equipment were very poorly kept up compared to what I've seen in the United States, that's of course anecdotal, but I have been a lot of places around Russia and rarely have ever seen a well-maintained base. One major reason for why Russia may struggle in a conflict is their lack of a modernized Navy for transport (not submarines), and the fact that a lot of their technology is Soviet-era and outdated.
Hopefully, we'll never have to find out how Russian weapons match up in large-scale compared to that of the Western World.