opinion.keeper

He has a short barrel shotgun, so the handrail looks so far forward because the barrel is 14 inches instead of the 18.5 of a standard barrel.

I've never heard of any issues from metal magazine tubes made by trusted sources (FFT, Daves Metal Works, Carrier Comp), at least not from anyone on this forum. I wouldn't worry about it if I bought one from a reputable manufacturer. If nothing else, I can say that the Carrier Comp tube I bought fit perfectly and hasn't caused any malfunctions.

If your goal is to keep it as close to factory as possible, I'd go with: -Magazine follower (Cheap and easy to install, a number of different companies make aluminum followers. They're mostly all the same, so pick whatever.) -Handguard (FFT has a US made replacement that looks identical to the standard OEM one. Not sure if anyone else makes one.) -7 round magazine tube (I don't believe you can use a factory Benelli one and have it count towards 922R compliance, since it's a non-US part. Someone can correct me if I'm wrong here. With that said, you have a number of other options. I went with Carrier Comp. The wait time can be a bit long, but the quality of the work is outstanding. Came with a compliant magazine follower as well, which was nice. Just installed it a few days ago. Took about 20 minutes.) -Trigger Guard (A&S makes a nice aluminum trigger guard.) There are other options, but this keeps the overall stock look mostly intact and requires minimum work.