Hey, how does the 22/410 Versa-Pack fire both the rimfire and shotgun centerfire primers? Am I confused about this? I am imagining a rimfire striker that grazes the shotgun primer, but works. I know one of the TC guns is set up to fire both rim and centerfire, but I beleive it's striker physically moves location. I doubt NEF will fit additional barells to the versa-pack, am I wrong? If NEF did have a good dual system and used the SB2 receiver, this would be a good selling point to add all rimfire and centerfire barells.