A Close Look at CMMG’s 300 Blackout Mk4 Pistol

OK, so this one was temporarily souped up. No worries, there’s a factory configuration photo here too. I think the 300 AAC Blackout caliber was really made for short barrels. Don’t get me wrong, I have a 300 Blackout AR-type rifle with a 16-inch barrel and love it. I...