The older Model 37s had barrels that were removable. Some of the new deerslayers have fixed barrels. I have several Ihacas-my experience is that they are great slug guns. I prefer using a rifled barrel. But I also have two smoothbore deerslayer barrels. I find a HUGE difference when it comes to recoil. A rifled barrel results in less recoil. The smoothbores hurt, make me cry like a woman after shooting. The rifled barrel is much more mild.
Mounting to the barrel is not the best option for a removeable barrel, because when removing and reinstalling, it will not be EXACTLY the same. Ithaca soon realized this, and opted for Williams receiver sights. I have drilled and tapped the receivers of a couple of Model 37s, I am not sure what the problem is that some have mentioned.
