[ifinnegan]

Construction staple gun.

And I said bullets but it’s more like metal projectiles.

[fretzer]

Nail gun?

[Ruy Dias de Bivar]

Some of those construction staple guns use a blank .22 or .25 cartridge. I am familiar with the Hilti gun.

https://www.homedepot.com/p/Hilti-DX-0-27-Caliber-Boosters-Cartridge-Yellow-20-per-Pack-337527/205824866