The prop gun that killed cinematographer Halyna Hutchins on a New Mexico movie set had been used by crew members offsite for fun, a new report claims.

The gun, which was fired by Alec Baldwin on the set of the movie “Rust,” may have even been loaded with live rounds when it was used for what was essentially target practice, TMZ reported.

Multiple sources connected to the production of the film told TMZ that the gun was fired at off-the-clock gatherings – which could explain how a live round found its way into the gun’s chamber.

Another source who was on set told the outlet that when cops arrived they found live ammo and blank rounds stored in the same area, where the fatal mix-up could have occurred.

Officials have not confirmed the claims, TMZ said.