How to build an AR-15 and enrage people part 4.44. Calming down with the 6.5 Grendel
Left to right. 5.56 77 grain hollow-point. 7.62×39 Russian 123 grain FMJ steel case. 6.5 Grendel 100 grain FMJ steel case. 280 British soft point. 7.62 NATO steel case. Shortly after the completion of my last AR project I received a gift from a good…