Building an AR platform pistol.
First 300 Blackout build.
Non-suppressed- Not an option where I live. Additionally I understand that suppressed "pistol" class ARs have a bad tendency to be over gassed as well.
7.5" or 9" barrel? Why? I know there is a bit of MV drop for each inch of barrel loss, but what is the shortest barrel that you can achieve effective velocities for 300 blk to "reliably" expand.
Best defensive ammo recommendation for punching meat at close range. (5m-25m)
Accuracy is nice / important but a round that prints groups like a laser beam at 200m is useless if it has the terminal ballistics of a wire coat hanger segment.
So.. as the subject says - ammo rec - for ballistic effectiveness- I'll wring out accuracy once the starting point is established.