Thank you for your Question.
Ayatullah Sistani under the title of Dress code general rule has explained the following:
The second method is that they are hunted by using a gun. In the latter case, the hunter must be a Muslim; he must invoke Allãh’s name while pulling the trigger; he must shoot with the purpose of hunting, and get to the place where the animal fell after it has died or when there was not enough time to slaughter it.
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