For some time now I have wanted to mount a light on my 590. I tried a kit that mounted my Olight flashlight to the magazine tube with less than desirable results. The recoil from firing caused the mounting ring to put quit a bit of pressure against the back of the barrel mounting ring (Ie: what holds the barrel to the mag tube, in case Im using the wrong term, and made it damn near impossible to get the end retention nut off to remove the barrel. I have looked at the short picatinny rail mounts that attach to the bayonet lug, but have seen reviews on most of them saying theyre a very loose fit. I am not interested in the Surefire fore end, both due to cost and I do not like the feel of it, plus I do not want to grind off the bayonet lug. Anyone have a suggestion for a more secure mounting method, or can suggest a good picatinny bayonet lug mount? It should be noted that I already have a dual-switch tailcap for Surefire 6P lights, the pressure pad, and a mount that will fit the 6P. I even have a spare 6P LED Defender that could be used for testing before committing to yet another $100 flashlight purchase.