no, you're not understanding what I'm getting at. I'm saying that if you introduce +3 moa off hand with an XCR, I'd argue you'd introduce +4 or more MOA with an ACR because it's harder to handle off hand. The actual amount of course is just a guess, but I'm saying that it will be more because the ACR is less balanced. If front heavy rifles don't bother you, maybe it doesn't make a difference to you. I want this rifle to be light and balanced enough for a young teenager to hold.
For me, a tactical rifle has to be the ultimate in usability. In fact, the SU-16 would have been the perfect tactical rifle had it not been the fact that the receiver is plastic, and is therefore unsafe as far as I'm concerned. But the weight and handiness of the Su-16 make it the perfect "tactical rifle" to me, because ANYONE can pick it up and use it. Sure, if you are a trained soldier or train often with your (heavier) gun - then it doesn't matter what gun you have. The fact that the XCR has readily available spare parts, different caliber conversions, keymod rail, cheaper, and is more lighter/balanced makes it a clear winner to me because it is simply more useful.
The ACR has only one thing that's better - accuracy. For some people it's worth it, for some it isn't. If I wanted accuracy I'd use my bolt action 223. If I want to do "tactical drills", I'd use my lighter handier XCR. I'd rather have two rifles for the price of an ACR, but I understand if some people prefer to just buy 1 ACR - especially to replace the Swiss Arms.
see this review of the ACR (point #7 talks about the weight):