MK I's/II's have no issue shooting unplated fodder.

They all shoot exceptionally on the average,but the III's are a Yuppified version of consumate utility,at the expense of reliability and replete with a higher price. Lose/lose.

MK II's get the nod,due to their ubiquitous mag supply,in conjunction with the aforementioned inherent mechanical advantages. Bang for the buck,they are squarely a steal.

For a knockabout,the fixed 422 really does horn me up.