Mil-Spec equipment is often looked upon much like a West Point slick-sleeve butter-bar with a compass...But when it comes to firearms there are too many on the market that are below the milspec bar. And when some folks realize they didn't do their homework and bought substandard, well they scoff at the standards. If buying a serious weapon it's wise to meet or exceed that bar, not fall short. That's what our military strives to do and many civilians and LEOs as well.
Sure, there are higher bars to reach than milspec but at least get over the middle bar, don't trip over it.
As far as 8MOA, I suspect many of our rifles easily beat that but it's not as certain that the shooter can.
Mil Spec., means: build by the lowest bidder that didn't loose its contract...
I dealt with enough military rifles since I started my military career 47 years ago to believe the above numbers are pretty close (for arms room guns, not match rifles).
M16A1
accuracy: 8 MOA
I read somewhere that the acceptable accuracy for an AK to pass QC was 6moa. That's not very far from a Garand or M14, which were its contemporaries when it was designed.All one has to do is shoot a AK47 with issue ammunition to see that accuracy is a low priority in modern weapon design. The Russians built an outstanding service rifle in the AK47: reliable, simple, but not accurate.