How do you like it, how is it holding up, are you using the loop or the QD mount, what are the little nuts for, and did it come with a wrench?
Thanks

I love it, going good, loop, if you dont use the loop, can't remember.

Anyone know if that clamp fits with a Wilson/Scatter Gun Tech extension?

If the extension is 1" in diameter, you are good to go.

Is the Wilson Combat tube a 1" tube?

Should be.

I haven't measured it with a micrometer, but I'm pretty sure the Wilson/SGT extension is a bit over 1" because none of the common mag tube extension clamps fit it:Tac-Star, Uncle Mikes,  Remington factory, a couple of others.
They're all either too small, or they tend spread the mag tube extension away from the barrel. In my estimation, neither of these things are good, so I'm still looking.

No idea on the Wilson ext.

I got mine in and the rear loop that mates between the stock and the receiver.  I tried the MS3 sling I got and did not quite like the feel of the rear loop set-up.  I had a brain idea and stole the QPB socket off my STR stock and installed it on the Magpul shotgun stock, took the loop off of the brl clamp, and added my Blue Force Vickers padded sling and instantly fell in love.  Since I robed the rear socket off the STR I had to get a Magpul rear sling deal for the AR and I put the MS3 on it and figured out that I really like it better too.  So with a mishap/like I found out that I like the current set up so much more.  I need to get out and try it for real instead of just around the house.

All I can say is Magpul did it right with the shotgun stuff!

It did not fit my Nordic tube 870, I was a little sad. So it went on my older 870 with the Choate tube. Gotta order a Nordic one now.