Tango Down rail mounted front sight. Anyone seen this?

New shots showing the Front Sight with a Surefire Mini Scout and an InForce WML.

http://www.qconcepts.org/photos/i-8W...8W7RfMx-XL.jpg

http://www.qconcepts.org/photos/i-Zv...ZvQX295-XL.jpg

http://www.qconcepts.org/photos/i-xz...xztLqM2-XL.jpg

http://www.qconcepts.org/photos/i-wP...wP3vTXs-XL.jpg

http://www.qconcepts.org/photos/i-xR...xRHksbc-XL.jpg

http://www.qconcepts.org/photos/i-Kd...KdGj3bZ-XL.jpg

Has anyone used this front sight? I was considering it for one of my rifles. I have read MM's review but that's all I can find on the part.

How much does this sight weigh?
Thanks!

Update:
Tango Down said on the phone it weighs 2oz.

Works well with a CQBL-1...
http://i275.photobucket.com/albums/j...6.jpg~original
http://i275.photobucket.com/albums/j...5.jpg~original
http://i275.photobucket.com/albums/j...1.jpg~original

Dredging up this thread, is this item still available?