Theatrical properties may be "practical" or not. A "practical sandwich in the 2'nd act" which mean that a real, not a canvas, porcelain plastic or painted model of a sandwich or whatever.
There was no member of the prop master's union IATSE on the RUST set.
No members of prop master union were on "Rust" set when fatal shot was fired. โฆ In an email obtained by Indie Wire, the International Alliance of Theatrical Stage Employees (IATSE) Local 44, which covers prop masters, told members "a live single round was accidentally fired.
https://www.newsweek.com/alec-baldwin-shooting-prop-gun-rust-live-updates-1641617