I got a rack of really tricked out or smoothed out ARs, all are DI , which I believe is the best way for an AR design. I also have a shorter rack of 3 AKs, all pre ban and two of them are well set up for practical shooting American style
. Tens of thousands to get top tier trained since the late 90s as my Gunsite orange training lapsed into 3 decades old.
If we are talking say 300 meter combat ranges either will work well when set up for the operator (sighted in ! ) . The modern M4 well smoothed out, will functions in the same realworld conditions as an AK but does require a LITTLE more maintence to remail so.
An Ak can be overcome by the AR system by using an ACOG on an improved M4 system and keeping your enemy more than 250 meters away preferably closer to 400 meters. A good trained and skilled marksman can attempt rested head shots at that distance with a 4x ACOG with a high probability , or take the body shot if not an armored foe and get near 100% probability of a hit . With the 77 grain ammo the effect will be sufficient.
I laughed when I first was brought into the m16 world in 1968 (I was in since 65) and was informed it was a "Varmint" rifle and how it would tear up small targets up to 400 yards. Yes it was a varmint cartridge and a darn good one too ! Having grown up near the the East coast capital of long range ground hog hunting the Matel toy looked nothing like the Varmint rifles I was used too from the late 50s on to then in 68 .
I was a dry bolt man and shaving cream dry brushed the red dust and dried mud off the boltcarrier assy and the other exposed parts and drislided the BCG and charge handle and called it good. I never had a stoppage, I fired off maybe 6 mags in semi fire in an attempt to get sappers in the wire with no problems in the Ashau Valley. A few other times afew rounds when needed and it worked, but I hated it and soon went to other guns leaving the 16 in the company arms room at Camp Eagle.
Well down and dirty one of my preban AMD-63s with low cowitnessed Aimpoints is very nasty to at least 200 meters , it is sighted in with the irons and the M2 Aimpoint and I can hold 3" 100 yard groups with them rested with decent ammo which with 4MOA dots is not bad. That allows a reasonable 200 meter head shot rested and is extremely fast in CQB ranges. One does not have to worry about any reasonable condition AK not going bang when properly loaded. Under no maintence in the early 90s I had an Ugly Maadi AKM in a service truck box and never lubed it, it was shot rarely but the truck was on rough dirty ranches an forests for 3 -4 years . When I finally decided to take it out it was starting to have fuzzy rust on the outside of the reciever and was even uglier than when it went in their - brand new . I sold it right before the California Assault Ban of 2000 and oiled up it still fetched almost what the half a dozen Chinese AKs I had at the time I dumped them in a gun store in OCT. 1999 and put high prices on them Everything sold before 2000- they did a TV shoot there featuring my rack of Black rifles which were going to be banned
Well this PS is "which is better" , well I think a tricked out AR will kick the well set up AK past 200 meters, like I said in the beginning. Both are now reliable with reasonable care (I'm a wet AR man now ) the AR has pinpoint accuracy to twice the range in a modern version.