Welcome to the new PGCA Forum! As well, since it
is new - please read the following:
This is a new forum - so you must REGISTER to this Forum before posting;
If you are not a PGCA Member, we do not allow posts selling, offering or brokering firearms and/or parts; and You MUST REGISTER your REAL FIRST and LAST NAME as your login name.
To register: Click here..................
If you are registered to the forum and keep getting logged
out: Please
Click Here...
Most American doubles manufactured before 1950 had a floating rib to allow heat expansion. Many of the guns manufactured post 1950 have a solid rib and make no allowance for expansion. A Rizzini O/U I handled this AM is a good example of a solid ribbed gun.