[bulldog_81]

Preferably somewhere I can buy it online. I thought Brownell's had it but I can't find it now. The extractor pin retaining clip.

 

[vertigosol]

Minus the actual tools I think these might work
http://www.brownells.com/gunsmith-t...rer-s-block-set-sku100003431-26201-51851.aspx

 

[mk23]

Is there an actual tool?

I don't mean the device the holds the bolt while you work on it, but a tool to help you install the clip?

 

[vertigosol]

The TD comes with a bolt clamp. The actual tool is part of the scar armorer kit which runs about 3-3.5k.
http://fnforum.net/forums/fn-scar-16s/48304-putting-c-clip-back-extractor-retaining-pin.html
http://fnforum.net/forums/fn-scar-16s/19285-c-clip-extractor-pin.html

 

[mk23]

So in that first link, there is a picture. Is the clip on the bottom side?

What do you use to "back" the C clip as you are trying to snap it over the pin? Like a punch? Or something else?