As promised, pictures of my foregrip, along with a story about the making of.
With the help from my internet Mossy buddies, I ordered a Magpul rail and an UTG five-position foregrip. The rail is longer than is necessary for the foregrip in case I feel like installing the angled foregrip in the future. I also got Magpul rail covers just in case.
About a week later, a box showed up at my doorsteps. Ohboyohboyohboy! But first I had to take a girl out to dinner...
Later that night, I started working on my gun (my 930 SPX, I mean). First, I had to make a flat landing strip for the rail. I took off the forend, put on my mask, my goggles, and even ear muffs. I worked in a closet so it would be easier to clean the plastic bits. Every guy's favorite tool, the Dremel, was what I started with. Soon I discovered that it was hard for me to get a flat surface, though the sander attachment took away the plastic very fast, melting some from the heat of friction. So after I took off enough, I wrapped sandpaper around the rail and started to even out the landing strip. Much, much elbow grease later, I got something flat enough.
Next, I had to drill two holes. I clamped down the forend in a vise in the makeshift workshop that is my kitchen -- after relocating out of the closet. I measured the centerline carefully, marked the locations of the holes, punched indentations, and carefully applied my drill. Success!!! I ended up using a bit that is slightly thinner (in cross section) than the holes on the rail, but the screws seemed quite happy with the result. I dabbed some Loctite on the end of the screws, and installed the rail! Yay! The hardest part was over, and I was proud of myself.
Then I installed te UTG foregrip. This thing has five different possible positions! When I'm bored I can just go "one two three four five"! After I put it on... rattle rattle rattle rattle. Oh, no! The thing isn't tight! I looked online, and people on Amazon talk about how to put in shims, or cutting the attaching clampy part of the grip so as to allow a better fit. I was getting discouraged. Did I buy the wrong thing? I wasn't about to make the suggested modification, since I have no access to the required machinery. So I played with it and played with it and played with it... until I discovered that a tight lock is possible if you put the foregrip in the right position on the rail. Voilà!