So I take it my suggestion is out? Also, 71th is not a number, 71st is,
Out of these, I'd vote for...
1
2
Maybe 9
5 sounds like a person's callsign
6 seems to be something like a division, but Sharpshooters is not a division in the military
8 is practically in use already by the Ruins Raiders
10 doesn't seem like a team name
Also, members will only know about discussions on here if we tell them or if they check, to my knowledge there aren't any notification options unless they subscribe to the group. (Group tools at top right of discussions postings, then subscribe)
Lastly, we should make a discussion for us to get to know each other and find out some other information. I don't know anyone else on the team except you guys. (Ex. Name, age, occupation or otherwise, guns they own, all airsoft experience including years playing, and anything else you might want to add)