As I wrote in my original post, I'm not doing it as a weight saving measure, I'd be chopping the barrel down for looks/length.
I just through a number out off the top of my head, though, if you're suggesting that I'm exaggerating or something (?)
If that's what you were responding to, I don't know what the answer is. Presumably 4-6" of barrel and the front site and barrel length add up to something, though.
I have no idea how much it will be, but I know from other issues that the barrel is dense metal and you can feel a noticeable change with a few inches of difference even without the sight post/bayonet lug.