If you do a lot of dry fire, yes. I always use one for dry fire sessions.
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If you are just pulling the trigger, not practicing reloads, a foam earplug can also work. An earplug adds an additional safety layer too if a live round is ever in the chamber.
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How are the spartan sights regulated on the compact? Drive the dot, or top of front sight?
Has anyone run across a video review for these yet, aside from Ernest's short PR release? I'm trying to decide if I want the centurion or the compact.