I have a brand new M40a3 MVP mount that I was given for a new rifle I was having built. I thought it would work on my A3-5 stock from McMillan, but the forend is different. Does anybody know what the value is on this and where the best place is to sell it? Not looking to rape anyone on price, but also not looking to give it away. Thanks for the input. the MVP is the forward NV mount in the picture.