I have a set of choke tubes and do not know what kind of gun they fit. They are .824 exterior diameter and 1.96 inches tall (to slight edge just below knurling) and have 32 TPI threads. They are marked according to choke, but not to type. They are very close to a Browning Invector Plus (2.38" diameter ) but are shorter. Let me know if you have any ideas.