Shrapnel Slinger — ruling 1

You don't choose a target for Shrapnel Slinger last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you sacrifice a creature this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.

Shrapnel Slinger : règles, fonctionnement et interactions (MTG)

Shrapnel Slinger is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

When this creature enters, you may sacrifice a creature. When you do, destroy target artifact an opponent controls.

How it works : Shrapnel Slinger

Original English text — Wizards of the Coast / Scryfall

#1February 4, 2023· Wizards of the Coast
You don't choose a target for Shrapnel Slinger last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you sacrifice a creature this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.
No other card is named in this ruling.