Schmi, thank you for bringing up the possible concern with faster twist. Link you sent shows 14 barrel options. I noticed some retailers offer MRAD also in 7mm Remington which I don't see listed on Barrett site.All those barrel options exist. The mk22 with 1/8 twist is what was spec'd by Army contract. Pretty sure on one of the podcasts Frank had mentioned that the Army has had some issues with 1/8 and 300norma spinning bullets apart. 1/10 is plenty and 1/9 is great too. If there is something you want call Barrett and ask for Franz. More barrel choices here. https://store.barrett.net/c-485-rifle-accessories.aspx?section=-60-&sortby=pricedesc
Looks like the standard "fully featured" MRAD with folding stock and user changeable barrels is sold out everywhere.