14.5 vs 16 weight difference

[rezin23]

I have searched the internets and cannot find the difference in weight between 16 and 14.5 inch uppers/barrels, if someone here could help me out that would be great, preferably both being lightweight contour barrels, but whatever info you have would be great.

Thanks

[bp7178]

http://www.03designgroup.com/technotes/ar15-upper-receiver-weight-comparisons