You are buying

Ukrainian stamps 2022 set of six bought from Khraviv..

One full set of stamps.  Six stamps.

One spent 7.62 x 51 mm round from the same area.  Fired by Ukrainian soldiers defending the city.

Only one spent round per stamp set.

Picture of  spent rounds for information.  Rounds are randomly selected so will vary slightly.

If in doubt message before you buy.

These stamps were bought from a post office in Khraviv by the organization ReactAid while delivering aid and supporting families in a metro station. 

Internet search ReactAid for more information on what they do.