H&K is releasing VP9 Long Slide Kit. It will be available from their web-shop. No words on price, but it is expected to be out in the first quarter.
HK416 in 22.lr
H&K also released .22lr version of their HK416 rifle. It is really similar but there are some cosmetic differences. It is made by Umarex.
Price is around $450
From: H&K