After a few hundred more rounds, I changed a couple things.
First, I ditched the Magpul forend all together. Switched to a Hogue overmolded forend. I like the more compact size of it, and I also like how, "grippy," or tacky it is.
I also ditched the FO front tube. Although it was screwed in and loctited in place, after about 60 rounds, it would start to spin out of its hole which was annoying. Also, the porting deposits a bunch of carbon soot, out of the ports and boom, onto the FO tube. Not a show stopper, but annoying. So I put a big, fat, brass bead in its place. I also appreciate the texturing on the grip, and if you have one, you would too. But I'm going to dumb it down with my mouse sander a bit on the web of my thumb contact area, as it gets eaten up raw by the texture. I put my hands into the mouths of HIV and Hepatitis patients regularly, and would rather avoid taking home any non-paying passengers (also why I shoot M&P's over Glocks...the M&P's don't damage my hands).
Mind you, I've never worked with a shotgun of this type before. I previously have shot conventionally equipped 870's extensively, for work and training, but nothing this short.
But I'm a high volume user. I've put between 200-350 rounds through this thing every trip to the range, recently, refining technique. And I like it.
As weaponcraft is a personal deal, you may find comfort and security in the hand strap concept of various executions. I'm quite content with the rubberized forend and the handstop/sling attachment point. I keep my hand firmly clamped on the proximal half of the forend, simply to prevent my thumb from getting near the porting.
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