Walther don't do the LGU undercover with FT style stock, and nobody makes a custom stock for this gun at the moment.

If you mean the LGV break barrel, there is one called the Competition ultra which has an adjustable cheek piece, but it isn't really what I would call an FT stock.

I can vouch for the fact that both the LGU and LGV are very accurate from the box. The LGV is the most accurate springer in 177 that I have ever owned. And I've owned a shed full.

My LGU was just as good, but I didn't really need two heavy 177 springers, so I sold it because of its extra weight.