1100 trap

I have a Remington 1100 field gun that has a 30" / 2-3/4", raised rib. Can anyone tell me the difference between this barrel and the 30" barrel on the Remington trap guns? thanx mike

Curious if anyone has an older 1100 Skeet-T that they might want to get rid of. I would consider any gauge as long as it is in good shape. Thanks for looking at my ad.