I wondered about the case taper which would require different magazines in the AK-74. The Wolf/Barnual 6.5 Grendel ammunition is reliable even though the case has less taper than the 5.45 or 7.62x39. Seeing how the Soviets fought in Afghanistan with the longer distance threats there are better cartridges than the 7.62x39 or 5.45x39. In a true military engagement where rules of engagements don’t interfere there are better tools for long distance engagements than the AK-47/74, like crew served weapons. Certain militaries might be willing employ these heavier weapons without concern for collateral damage.
Other than the magazines being different I prefer the 6.5 Grendel to 7.62x39. In an AK-74 the 6 ARC might not be much more difficult to control in full auto than the 5.45x39. The 6 ARC looks to have several advantages in an AK-74, no decrease in ammo capacity, flatter shooting with higher energy on target. With the Russians using more optics and having graduated iron sights the 6 MM ARC could increase the effective range of the AK-74.
There are civilian shooters in the US that really like the AK carbines and there might be a market for the 6 ARC with these shooters.
Other than the magazines being different I prefer the 6.5 Grendel to 7.62x39. In an AK-74 the 6 ARC might not be much more difficult to control in full auto than the 5.45x39. The 6 ARC looks to have several advantages in an AK-74, no decrease in ammo capacity, flatter shooting with higher energy on target. With the Russians using more optics and having graduated iron sights the 6 MM ARC could increase the effective range of the AK-74.
There are civilian shooters in the US that really like the AK carbines and there might be a market for the 6 ARC with these shooters.