I say go Colt for 5.56 and M&P15-22 for 22LR. 2 M&P15-22 here, both of which run nearly 100%. Very pleasantly surprised with the performance. Formerly, I normally would have selected one of several 10/22 to hunt paper or gophers with. I find myself going to the M&P15-22 more often than not now.

No experience with the Colt/Umarex but all signs point to no way.