The president of HK-USA mentioned in an interview that H&K has sold a license to Umarex for the production of .22 LR rifles patterned and branded after the H&K 416, MP5 and MP7. From HKPRO forums:
.22′s: HK has licensed Umarex to produce .22-cal versions of the 416, MP5, and MP7. At least some of these should be on display by SHOT Show in January 2010. It has not yet been determined which models will be released first.
At this years SHOT Show Umarex unveiled a licensed rifle patterned after and branded the Colt M4.