I own a mossberg 835 ulti mag and wanted to know if I could stick a 500 18-1/2" barrel on it as I heard that the 835 is just a 500 with a different barrel.
Barrels are not interchangeable between model numbers, gauge or capacity. 500®, 535™, 590® and 835® barrels are interchangeable only with barrels of the same model, gauge and capacity.