Ha! You made me break out my new scale out of the box to weigh it just for you lol. I haven't weighed any of my guns yet and I've had the digital scale for awhile.
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8.665 lbs. The weight specs on my March 4.5-28x52 says 29.8 ounces. Not bad for a 34mm tube.
In regards to eyebox, the shorter the scope and the higher the magnification ratio/erector assembly is, the tighter the eyebox. So a March 3-24×52 has an 8x erector design (24÷3=8x). Nightforce NX8 F1 2.5-20X50 also has an 8x erector assembly (20÷2.5=8x).
The March-FX High Master 4.5-28x52 has a 6.22x erector assembly (28÷4.5=6.22). The lower the erector assembly is, the better. That's why some 3-9×, 2-7x, 3-12x, 4-16x look really good optically. Other compromises in a short bodied, high erector assembly are finicky parallax/focus adjustment, edge distortion in the lower end of the magnification range, and shallow/narrow depth of field.
Also, some scope manufacturers would put a field of view stop to hide the edge distortion and thus having a smaller field of view. This goes for some alpha class/tier 1 scopes as well. I'm no scope expert but just regurgitating some stuff that's been said before.