I'm not an Auto 5 fan. Like most Browning designs the Auto 5 it is overly complex, difficult to disassemble, doesn't switch easily between light and heavy loads and IMO handles like a stump.
The Belgian-made guns are fixed choke and Browning advises not to use steel in them. Therefore you are limited to a Japanese-made model if you want choke tubes and plan to use steel. Having Briley install choke tubes doesn't make much sense because the cost of installation, the chokes and shipping will come close to what the gun is worth and you will not get that money back should you decide to sell the gun at some point.
Here's a thread that you might find of interest:
https://www.canadiangunnutz.com/forum/showthread.php/1584639-A5-bolt-stuck-to-the-rear
The Auto 5 was ground breaking in its day. That day was in 1902. There's nothing wrong with using an older design provided you go into the gun fully aware of its quirks and challenges.
OMG someone that thinks like I do about them. I always say they handled like a log




















































