I don't know why people are saying if you sell AR15 you will regret it.
I served and carried m16...I've owned/built many AR15s and at one point I sold all of my AR15s and went to AK74. The only reason I went back to AR15 was because friends had AR15 and using same mags was a huge factor for me.
Well, PAP M85NP has AR mag adapter, so solves my problem. I won't get rid of all of my AR15s since the market is flooded and I'm not taking a loss on my rifles.
OP, I don't feel you will "regret" getting rid of your AR15...they are a dime a dozen. Going AK47 will allow you to share ammo with your SKS, so that's a huge plus for you.
AR15 isn't going to fire rusted steel ammo and may not fire steel ammo 100%. I found some rusted 223 ammo last time I went to the range...put it in my Lancer mag and my M85NP shoot it with no issue. No way my AR15 was shooting that ammo.
Don't get me wrong, I dig the AR15 platform as I feel it's the most modular platform out there, BUT I just dig how simple the AK is and I can fire my M85NP folded...cannot do that with AR15 rifle/pistol. I find that to be a great asset since I can carry my AK pistol with LTCF in PA.