Will a Mossberg 12ga 26in smooth bore barrel fit all mossberg models?

No, a Mossberg 12ga 26-inch smooth bore barrel will not fit all Mossberg models, as compatibility depends on the specific model and action type. For example, barrels designed for the Mossberg 500 may not be interchangeable with those for the Mossberg 590 or other models. It's essential to ensure that the barrel matches the receiver type and model specifications for proper fit and function. Always consult the manufacturer’s guidelines or a knowledgeable gunsmith for compatibility.