Only a little research was necessary:
In the CSMC A-10 FAQs you can read:
3. How was the mechanical design chosen for the A-10 American™?: We combined the best ideas for full sidelock shotguns that would be cost effective, but without sacrificing anything in regards to aesthetics and reliability. The results of this laborious research was the A-10 American™;Here are the Beretta SO10 locks:
Here the A-10's:
One can clearly see where the
"laborious research" was made. Surely the "10"
used in the name has a clear origin.

With that heritage and quality manufacturing the A-10s should be great guns.
Very good looking for a very good price.
JC