(based on a discussion I had this afternoon with HK-USA's president this afternoon)

HK is hoping to having the MR556 and MR762 available by 1Q10. Right now, they are working with ATF to produce the requisite number of parts domestically while keeping the price down. So for the time being, there is no MSRP set.

The plan is to have 16" and 20" barrel versions.

There are no plans to produce the guns in other calibers.

Umarex .22lr versions of the 416, MP5, and MP7 have been licensed. The first ones should be on display at SHOT. No final decision has been made about which model(s) will be available first.