No way of being able to tell without knowing the manufacturer or model.
Only Colt knows, and they aren't telling. Made from 90-99
NOS stands for New old Stock, so it is recreated as if it was made in the time of original manufacture
1996
Data not available in the public domain.
Brown. British gun makers, vol. 1. Page 105 gives a list.
Nos is short for Numbers.
"Nos."
The Nos kid is a mythical beast who is addicted to the Nos energy drink, and cheesy nos jokes (replacing not with nos). It has blindingly white skin, and flosses with organic floss.
Nos is dangerous
"Nos vemos" translates to "See you later" in English.
yes you can get nos you just need to do races and they give you a car with nos
Question can't be answered without providing the name of the maker. Even then, if data has not been published it can't be answered.