Do you plan on using the CCH as a BUIS or as your primary sight. If as a primary, I'd leave it alone. I don't think your saving much weight at all!
Edited to add: I don't have a scale that reads that low!
Ok.....I sorta lied, I don't have a scale, but the wife does! So when she wasn't looking I stole her baking scale and threw the remnants of my CH on it.
The remnants weigh exactly 100 grams or 3.527396 ounces. So if you were to make your cuts EXACTLY in the same position as I did you would save at least that much weight.
I don't want to remove the sight portion from my rifle to weigh it alone, but your milage there will vary. Depending on how much material you remove to dress up the sight after cutting, each sight it self will weigh differently.
Hope this helps!
[img]http://www.hunt101.com/img/080505.jpg[/img]
Now I need a covert Op to return the old ladys scale before she sees me!