So I'm trying to figure out why all these lovely AR and HK clones on the market (in .22 LR ) all have mag capacities in the range of 20. The mags are every bit as long as .223 PMAGs and yet they only hold 20 rounds. The Ruger BX-25 is huge and still only fits 25 rds. I'm assuming this has something to do with an inability to stagger the .22LR round? What's the reason for that?