The first option was a blind magazine which has no floor plate, the second is a conventional magazine with detachable floor plate and finally, a detachable box magazine.
There are standard consumer versions as well as versions designed for military and police use.
The 12 letters in order correspond to the months of the year.
The second letter, and third if it exists, indicates the year.
In February 1977 an “A” was added and the range was restarted at A2100000.The Remington 700 was produced in many differing configurations depending on the use, Remington produced the basic 700 furnished with different stocks, barrels, finishes and over 50 different calibers.