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While my stats could use a boost with a "new topic", I decided just to resurrect this one.]
Got my OFFICIAL Mossberg ghost ring sights in about 6 months ago. Yeah-h-h-h-h.
There's no easy way to attach the front sight. Boo-o-o-o-o-o-o.
I asked a couple of store smithy's and they all said that silver soldering wasn't something they felt comfortable doing. They'd all done it in gunsmith school, but didn't want to attempt it in real life. One smith told me he leaves the little post sight in place and uses it as an anchor to epoxy the new sight base to the barrel.
I can do electronics soldering. I mean the old school stuff, not the surface mount used now a-days. I got a role of silver solder and finally took the bull by the horns. I mean how bad can you screw up an 18" Mossberg barrel?
No punch line. While it wasn't pretty, it's done. I just need to re-blue the barrel now. Now that I have one under my belt, the next one will be a little less messy and better quality. No the bead doesn't run around the eadge evenly, but it's on pretty darn secure. I pre-tinned both the barrel and the sight before I clamped them together.
Here's a closeup of the work. I filed the excess, then fine sandpaper and then steel wool. I will use a magnet to clear the steel wool shavings before I do the re-blueing.
And it's pretty straight too. Can't wait to take it to the range to check zero.

So in keeping with the thread. The less expensive Mossberg 5xx's that don't come with the ghost ring sights will require some gunsmithing to attach.