I was just wondering for DBMs for FN rifles. I was wondering if you have to buy bottom metal for a specific model or if there is one that fits all models. I was looking at the Seekins bottom metal and was wondering if it was just for the common Remington or Surgeon rifles or if it was able to mount it on another type of action. I know this is kind of a newbie question so be gentle in your responses. Also if you have any options for my FN SPR I would also appreciate it. I have seen that CDI is an option but if it was the only one.