The following weapons were used in the film Orphan:
Smith & Wesson Model 36
Esther (Isabelle Fuhrman) retrieves a stainless steel Smith & Wesson Model 36 from a small gun safe in the garage. She immediately unloads all six rounds except for one, which she attempts to use to play "Russian Roulette" with Max (Aryana Engineer). The ammunition is shown to be Federal .38 Special +P lead semi-wadcutter loads with nickel casings. The gun is again used by Esther and briefly by Max in the film's climax.
A police officer can be seen with a Glock 19 briefly in the climax.