LMT announced this product "unofficially" at SHOT earlier this year and have shown working prototypes since then. Reports were very good from what I heard, but the product have never been put on their product list or price lists. Last time I spoke to the factory about them (@ July) they said "maybe" November for first availability but they wouldn't take orders for them as they still weren't "official".
There is supposedly going to be a kit that allows anyone with an MRP to convert to the gas piston system but no details on how... or price... or when.
If it's just parts then export shouldn't be an issue but trying to predict the future is like predicting the weather... who knows for sure?
I've been running a CQB MRP for 2 years now and frankly it runs so well and so clean I can't see any reason why I'd want to change to the GP... but that's just me.
Mark