Exactly, BBear- the one with the butt clamp. Greg brought up an excellent point about long tanges. If one bends, when bent back, if possible, it will then, possibly be longer than the inlet depending on how much it bent - it's not something to take lightly.
Taylor addresses this with a tang protector - block of wood hollowed out to take the tang, so only the breech of the barrel is supported on the top of the block. The tang floats inside. If he sees this post, he might take a picture for us- or make a drawing.