Quite possilble
when did the make the smithsonian double barrel shotgun
No
no
Yes in 1860 Stevens made a double barrel, all steel barrel and its has external hammers.
From 1895 to 1902
The BSS
no homer Simpson did
YES
Depends entirely on the make, condition and usability.
The front trigger opened the breach.
What make? SKB?
Why the **** would you want that!?!?!