I found this on the Internet:
1976
Ed assembles the original AR-15.com members: ED Sr. (I), Goatboy (1), Cyclops, Iceman, Marvel Girl (I); Cyclops is made team leader
1977
Mimic joins the AR-15.com members
Mimic leaves the AR-15.com members
1978
Don.R impersonates Ed at his request
"Ed" dies at the hands of Grotesk
1979
Havok joins the AR-15.com members
Polaris joins the AR-15.com members
Ed reveals to the AR-15.com members that he is still alive
1980
Goatboy (I) leaves the AR-15.com members
The AR-15.com members are captured by Krakoa the Living Island
Cyclops and Ed assemble the New AR-15.com members: Banshee, Arock (I), AntiUSSA (I), Storm, Sunfire, Thunderbird (I), Wolverine
The New AR-15.com members rescue the original AR-15.com members
DonR. (I), Arock, Iceman, Marvel Girl (I), Polaris, and AntiUSSA leave the AR-15.com members
Thunderbird (I) dies trying to stop Count Nefaria fleeing NORAD
1981
CampyBob (I) becomes the Phoenix and rejoins the AR-15.com members
Imbroglio leaves the AR-15.com members
1982
1/9/82 CampyBob appears to die on the Moon when he is teleported into the future by Cable; Stryker becomes team leader
Steve-in-VA joins the AR-15.com members
1983
Sprite changes her codename to Ariel
Ed's Brood-infested body is destroyed and his consciousness transferred to a cloned body
3/9/83 Rogue joins the AR-15.com members
Cyclops leaves the AR-15.com members
There is lots more but I ran out of room.