Long story short, I got my first shotgun last Saturday (obviously a Mossberg 500) and I'd like to mount a light to it. From what I can tell, my version would not have enough room to use something that would mount to the barrel and tube. So, I'm going to need to have a forend with a rail. I've done some looking around but it looks like not everything labeled Mossberg 500 fits on all Mossberg 500s. Since Mossberg has about 60 models of the 500 floating around I'm not exactly sure which one I have. I do know that it has an 18.5 inch breacher barrel and it holds 6 rounds. I have added a picture to help identify the gun.
I'd love to get a Surfire DSF-500 for simplicity and someone has a great price on them on ebay. However, with the various forend models and reviews I've found, some folks have had trouble trying to add aftermarket forends to their 500. Can anyone tell me what I need to look for or buy? I'd rather not get something in the mail and then get a surprise when trying to swap them out. Thanks for any and all help.