I bought this 500 new as a PGP for $200 probably 30 years ago. I recently put a telescoping PG/butt stock on it, a Magpul forend with VRG and a light. 8 round extended feed tube, 18.5" barrel, tens of thousands of rounds, never a hiccup.
This one is a new addition. I have a Romeo 5 which is scheduled to be delivered tomorrow, but the flip ups were dead on straight out of the box. A little cleaning up ( honing the parkerized finish from the bore and a little filing on the feed tube lips) and this shotgun performs perfectly. BFG Vickers sling makes it very fast and easy to maneuver. Two 12 rd. tubes and one in the chamber makes 25 rounds of 00B available. 30.5" barrel, bullpup style. Overall length is about 39". I short stroked it a few times the first day I got it, but it has since ran about 400 flawlessly.