Unusual Parker?

[Bill Murphy]

Do these contraptions keep the shell from falling out when the gun is open? Yup, we need pictures. What makes you think the gun was made for pigeons? Does it have anything to do with the "gas checks"?

[Roundsworth]

If this is similar to a gun I recently read about on the DG forum, there are spring devices projecting into the chambers that maintain tension on the shells to prevent them from dropping out.