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Pictured here is a Browning Auto-5 with a straight-comb stock (and the full length barrel), which was something that was an option for these guns. I think it quite suites the old style aesthetic of these shotguns, and contrary to what some may think, this stock shape is actually rather comfortable (at least in my opinion).
Something which was available from some manufacturers as a police gun was an Auto-5 with a full length magazine tube to go with such a long barrel (and an extra long handguard to match), which would give it a capacity of I think 9 or even 10 plus 1.
The Auto-5 was a very popular shotgun, it stayed in production for a VERY long time, over 75 years I believe, because it just worked very well. Thus, it's very easy to find used Browning Auto-5s, Remington Model 11s, and Savage Model 720s, and often they're not all that expensive, one in decent condition and with an intact stock can go for about $600 or so, while a rougher one can easily be cheaper. These were available in a variety of chamberings, the typical 12-Gauge, but also the smaller 16-Gauge (a less popular shell these days), and 20-Gauge, the yet smaller shell which is the second most common shotgun shell next to 12.
John Moses Browning is said to have considered this gun his best achievement, and it's certainly a good shotgun which has a long history with hunters. Still to this day, people take these out in forests during hunting seasons.