I have a Browning Auto 5 in 12 gauge Magnum, made in 1958.
When it was given me, in the early 1990s, it had a long "goose gun" barrel on it.
I decided to turn it into the "house gun" at my cabin in British Columbia, Canada, for bear protection.
A new slug barrel with rifle sights was more than $300, but after searching for months I found a 21-inch Miroku/Browning barrel, smoothbore, with rifle sights, on Ebay for $150. The barrel is like-new, and designed for the Magnum Auto-5.
I replaced the nice walnut with a plastic stock and forend from Butler Creek, then added a sling.
The right cheekpiece has a cartridge carrier for five extra rounds.
At the cabin, I load it so the first shot is a 3" shell loaded with 00 buckshot, followed by Foster slug (the classic design). I alternate with slug and buckshot shells.
If I have to use it on a bear at close range, I don't need a $3 "super ultra wunderslug" that shoots flat to do the job, I just need a big chunk of lead.
At the cabin, I remove the magazine plug to turn it back into a 5-shooter. This gives me five shots as fast as I can pull the trigger.
Heck of a close-range bear gun!
With these loads, the Auto 5 recoil is significant but less than with a pump.
One thing about the recoil design rarely mentioned: it can be used with black powder or any other propellant that causes a lot of fouling. A gas system will be plugged in a few rounds, but the recoil system just keeps on going. There is no gas port or piston system to get fouled.
John Browning designed this shotgun when black powder shells were still commonly sold. The Browning company has always strongly suggested that the customer use smokeless powder shells, but if you were in the backwoods in 1915 and the only shells you could find were black powder, they'd work!
Yet another tribute to Browning's genius!