Shotgun

Maybe a sawn-off Winchester Model 1200? It looks like it has a slug barrel on it. --Funkychinaman (talk) 00:58, 26 January 2014 (EST)

Thanks! I had the same idea but wasn't sure (especially because of the shape of the pump). Greg-Z (talk) 01:12, 26 January 2014 (EST)

Unidentified weapons

In the final scene several police detectives carry revolvers. Their general shape is similar to Manurhin MR-73 but it's hard to say for sure.

A plainclothes detective draws a revolver from showlder holster.

Another plainclothes detective holds his revolver.

In one scene Germaine (credited as "The Grey Woman") (Stéphane Audran) draws a pistol from her handbag. The gun is seen very briefly and blurry.

Germaine draws her pistol.

She aims...

...and fires.

In the final scene several policemen carry rifles, some of them with sniper scopes.

Policemen with rifles are seen at the background.

Policemen with rifles.

A policeman at the left carries a sniper rifle.