I ordered a Shilen trigger a couple weeks ago. They've worked great in the past on my other Remington 700 actions. The rifle I recently received from GAP has a new action, and apparently there are some differences in the internal workings. No matter how much the sear is engaged, the firing pin drops when you run the bolt fast. What parts do I need to order to make the new action operate in the same way as the old ones, so that the trigger will work?