Tempo (2003 film)
Tempo at IMDB; starring Melanie Griffith, Rachael Leigh Cook, and Hugh Dancy.
Since I don't have screenshots to post, and it would otherwise qualify as a "lame"/"weak" entry, I'm parking the information here.
The assassin of Juliana (the old widow) uses a silver-finished suppressor-equipped Beretta 92 (see c. the 21 minute mark), while Walter Shrenger's bodyguard uses a black finished Beretta to kill George Maldonado and his men (c. the 76 minute mark).
Walter Shrenger's bodyguard uses an Uzi to kill Sarah James and Jack Ganzer (c. the 77 minute mark).
King & Maxwell (TV series)
Ruger Speed Six
My Old Lady (2014 film)
My Old Lady at IMDB; starring Maggie Smith, Kevin Kline (Mathias "Jim" Gold), and Kristin Scott Thomas.
Jim Gold's room in the apartment contains a gun rack with three long guns, the center one of which is a side-by-side double-barreled, double-triggered shotgun, apparently in 12 gauge.
To Kill a Mocking Bird
To Kill a Mocking Bird at IMDB.
Atticus Finch uses a Krag-Jorgenson to kill a rabid dog.
Possibly a double-barreled shotgun.