You're asking a very broad question. Rifles are manufactured in a variety of sizes, and weight can vary greatly between different models.
That depends on the exact model of rifle.
Depends on exactly which rifle(s) you refer to.
9+ pounds.
14 lbs
@ 5 lbs
About 7.5 lbs.
roughly one pound, when loaded
they usually weigh about 20lbs.
Usually a pound of past will weigh in at 16 ounces... but sometimes it could weigh as much as .45 Kilo
It depends on which rifle. <><><> Agree with above. There is no one "assault rifle", and no one weight. The German StG44 weighed 10.2 lbs, the M16 weighs 7.1 lbs.
U.S. nickels weigh 5 grams each.
24 kg usually