I have a Mossberg 500C 20 gauge. I bought it used with factory wood stock & forend. The stock had a crack in it. I decided to replace it with an adjustable stock with pistol grip. That in return led me to want to turn it in to a tactical shotgun. So I set out on that mission. Replaced the 26" barrel with an 18.5" barrel. Finally after numerous hours of research found a black forearm with tri rail pictanny rail mount made for the 20 gauge, and then found me a 7 way position vertical/horizontal folding front grip. Also had a plain black sling strap to it. Shotgun is now complete. First picture is comparison of the now picture next to a picture of it stock when I bought it.