Sig 522 Front Sling Swivel Attachment

[QuailJeeper]

I've seen a few pictures of Sig 522s with a loop to attach a sling fixed to the left side of the front "gas block". Mine doesn't have one.

It has threaded holes on either side of the gas block. Presumably to install sling pivots.

Has anyone attached a sling pivot to these? What hardware/specs did you buy to attach a pivot?

[goofcat]

A picture would help a lot.

[QuailJeeper]

Good suggestion. Wasn't at home when I first posted.
Here's a photo:

Y

[QuailJeeper]

Hey Calgunners...any idea what hardware I'll need to attach a swivel to that hole?

It's threaded for the same screw as the attachment point on the receiver, but if I simply move that nub to the front, it won't rotate freely. Any idea what I need to attach to it?

[QuailJeeper]

I found the answer so I thought I'd post.
It takes a swivel stud like these from Yankee Hill:

http://www.midwayusa.com/product/929048/yankee-hill-machine-free-float-tube-handguard-bipod-stud-aluminum-matte

Here's a video I found that makes mention of it. Jump to 4:30

http://www.youtube.com/watch?v=WgM12xn_hhM&feature=related