0-500 USD depending on EXACTLY what you have and overall condition.
One made for the weapon.
100-1000 usd
what is your question?
1975
Up to 1000 USD
Contact a good gunsmith
100-1000 and up depending on specifics
Impossible to value with only a serial number.
SN were not required before 1968
50-600 USD depending on specifics.
An automatic rifle is a rifle which loads itself from a belt or magazine.
0-500 USD depending on condition.