If we’re including DAO guns, the KelTec PF9 and Ruger LCP should be mentioned.
“There is no growth in the comfort zone.”--Jocko Willink
"You can never have too many knives." --Joe Ambercrombie
The PF-9 (along with the P3AT & P32) are hammer fired, but they do not have second strike ability.
And even though it was recently discontinued after 25 years, the old P-11 was true DAO hammer fired with 2nd strike & flush fit 12rd mags available from KelTec. That was my first pistol. I still carry it often.
I also often carry a Beretta MiniCougar. Mine was a D, but I added the parts to add single action. It is very close in size to the 81 Series guns, but is definitely chunky.
I have a couple of those as well. FYI, I found that Wolff's springs fit these (the BB and later guns use different spring diameters), and Wojtek Weaponry has done a run of replacement firing pins (since they're somewhat fragile and Beretta no longer makes spare parts for anything unique to the older-pattern guns).
Matt Haught
SYMTAC Consulting LLC
https://sym-tac.com