9x19mm out of a long gun is a dog of a round.
Its too low powered. The round actually loses velocity in a 16” barrel. Thats why true sub-guns have a 9-10” barrel. Same for the .45aarp.
You’d be better off with a .22magnum in something like the Kel-Tec CMR-30.
45aarp?
Not laughing!
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