Any advice on a 458 SOCOM upper?

[DrHenley]

Originally Posted by Horse'nround

So whats your barrel thread pitch 5/8-24 or .578×28(45acp)?
you could always try the oil filter adapter game til you properly certed (mugged) and get the real thing...

Looks like you got your sling mount figured out.

Believe it or not, I do not know what the thread pitch is. I will have to remove the flash suppressor to find out. The dealer didn't know, and the web site for the manufacturer isn't working right now.
The sling is just temporary. Clipping onto the fixed sling swivel on the butt doesn't really work for how I want to carry the rifle up a ladder into a deer stand, but deer season is over so no hurry on that. I have found a QD mount that attaches to the webbing slot but they are out of stock.