Dry firing it a few times really isn't going to damage anything. But yeah, it's not a good practice to dry fire most rimfire firearms on a regular basis. You can try pulling the slide back just a smidge and pulling the trigger. That way the firing pin shouldn't contact the breech face when the hammer drops. Or, you could use a 'snap cap', dummy 22lr round, spent casing, or, a wall anchor in the chamber.

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