Quote Originally Posted by RedFox View Post
s: ружьё - ружья - ружью - ружьё - ружьём - ружье
p: ружья - ружьев - ружьям - ружья - ружьями - ружьях
(подчёркнуто ударение)
I've added the endings to my table.

I do have some questions about that though.

1. To which gender does that row belong?

2. To which declension type does that row belong?

3. Can the accusative plural be nominative or genitive? (N or G, in my table)

I'm guessing from the way -yo is declined, that it is of neuter gender and falls within the second declension type, with accusative plural being N or G. However I prefer to get that confirmed by people who know more about this than I do.