Honestly, when I buy stuff that looks fishy or the description doesn't fully describe the product, I usually google the part number or their stock number and see if I can find a match. Troy might be thinking that you didn't pay attention when you order the sight and that it's your fault you bought the wrong one and that you're trying to get them to fix your mistake. Because technically, you should be able to argue with buds that they didn't have the description clear enough and that they should be the ones sending u the new correct sight, not Troy. Just the flip side of the coin imo. Don't take it as a personal jab.
CTD copy and pastes the description form the troy website product description. NEITHER sights troys NOR the retailer had mention that they product would not work in any particular situation. I based my shopping from troys website, then found that CTD had the same product part number copied straight from TROY, for less, and since i had other stuff i wanted from CTD, it was a clear choice. What more could i have done, besides hire an advertising channel to find someone with this same product for me to test on my gun, prior to buying it, to find out that it was not the right product. I already had talked to someone at troy, told them what the gun was i built, and was assured that product would work.