I got a 21-in. M2 Field three years ago for a snow goose control/3 gun funster. Got the obligatory go-fast Nordic Components goodies and slew a truckload of snows; still ain't done 3-gun so no receiver machining yet.
It's my suburban back door pest gun. Run the regular Comfort Tech w no spacers. A Ute model would be great, but not a priority now. Am going to look up the XS sights however. I like the BDT bead I put on my 14-in. Work 870 a lot.