Your question is sort of like "How much does a car cost?" Depends on the car, and depends on the rifle. If you mean a civilian version (semi auto) of an AK47, about $400. If you mean a legal, select fire (semi or full auto) M16, about $16,000 plus fees.
Less than 100 to 500 or so
Multiple thousands.
Assault rifle.
Which rifle are you refering too??
If able to be legally transferred, multiple thousands.
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.
The SOAR (Special Operations Assault Rifle).
There are several different assault rifles - both by the true definition of an assault rifle and by the political motivated BATFE definition of a so-called "civilian assault rifle", manufactured by several different outfits. Which assault rifle did you have in mind, specifically?
The first true assault rifle debuted in 1942.
MY Brand New Stag Arms M-4 Model #1 Cost me $850.00. I love it!
You will need to define assault rifle, and where you live. A TRUE assault rifle is a machine gun, and transfers of them are tightly regulated by the Federal government. What most people CALL an assault rifle is nothing but a semi-automatic rifle, and in most of the US, does not require a license to possess.
Only with a very small assault rifle, or a very large purse.