The AK with the HALO was chambered in 5.56 and had an excellent trigger. It's not mine but shooting was really smooth. Caliber and suppressor made it that way. I didn't know there was an AK adaptor for the HALO. Wonder if it fits the current version of the HALO.
I also shot the MAC's but without stocks or suppressors, no barrel extension either. I tried to fire in continuous burst but found either I had to let the guns rise or get pushed back. It actually made me take a couple steps back while firing before the mag dump ended. You would really have to lean hard into it but I had both arms fully extended so leaning far out was awkward. It's hard enough just to hold on much less keep level an M10/45 with one hand shooting it that way.
BTW, If someone recently lost a steel target at the Cushman range, drop me an IM with details, I may know what happened to it.