I have a trapdoor 1873 with a cartouched 1886 dated stock. recently obtained a bayonet that does not fit flush with the muzzle of the barrel but, rather extends about 1/4 in' or a bit more past the muzzle. does anybody have an explanation for this?? bayonet fits right over the front sight and locks up as intended. my trapdoor is a Springfield. could this be for a different maker trapdoor?? as you can see in the picture it is a flush fit. my barrel sits below the bayonet opening. thank you.