I see some AR hammers on lowers and it's been stated these hammers are notched for 9mm use.
A) How can I tell if any of my current AR hammers have this notch? I'm unfamiliar with it.
B) What exactly is the notch for? Does it hurt to not have it on a 9mm AR?
A) How can I tell if any of my current AR hammers have this notch? I'm unfamiliar with it.
B) What exactly is the notch for? Does it hurt to not have it on a 9mm AR?
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