Bill Devlin (Craig Conway) holds a Webley .38 Mk IV in several scenes in "The Menace of Mephistopheles" (S09E01). Ispettore (Sgt. Maj. rank) Mario Angelini (Raffaello Degruttola) of the Gendarmerie of Vatican (incorrectly referred as Papal Carabinieri) holds a Webley .38 Mk IV in "The Final Devotion" (S09E05).
When Bill Devlin (Craig Conway) tries to escape from police, his revolver switches from a .38 Mk IV to a Webley .455 Mk VI due to a continuity error, or because in this scene Devlin fires his gun, and the previously used Mk IV could be a non-firing prop.
In a flashback scene in "The Final Devotion" (S09E05), set during the liberation of the Southern France, an American MP holds a vz. 24 Czech Mauser, probably used as a stand-in for M1903 Springfield.
In the same scene a French gendarme holds a rifle that is seen only partially. The combination of the front sight with large protective "ears", the upper handguard that extends till the second barrel band, the shape of the top barrel band and of the head of the cleaning rod allows to make a guess that this is a Portuguese Mauser-Vergueiro m/1904-39, a version of m/1904 that was shortened and rechambered in 7.92mm Mauser caliber. Original m/1904 has longer barrel and lacks the "ears" on the front sight. Note: this is the first recorded occurrence of Mauser-Vergueiro on IMFDB.
A bolt action hunting/sporting rifle with sniper scope is used by Stanley Buchanan (Evan Milton) and then by Gabe Hawthorne (Luke Nunn) in "The New Order" (S09E06). It is supposed to be a Browning BBR, judging by the rear part of the bolt. This rifle is anachronistic for 1950s as the production of the Browning BBR rifle began only in 1978.
