Re: where to buy the M40A3 Timberwolf NV mount ?
All the extended front rails for NV I have seen are not bolted to the stock they are two piece top & bottom. The bottom is bedded/epoxied into the stock after the stock in inletted for the bottom half. When installing the mount make sure that you level the whole mount to the scope base and center the NV mounting assembly in the barrel channel or around the barrel, Should be the same centerline unless the bedding is not true.
I hope this helps.
Ern