Most of use snipers use bolt springs , but as for CQB , shotguns are best , the video with scoutthedoggie in it probally used mostly aegs , sorry I haven't seen it yet . For side arms like semi-automatic pistols green gas and Co2 like you mentioned above are used . Upgrading Aeg tips can be found all in this forum , so good luck any thing you need just ask me , or Admin or one of the many Moderators .
.......................... Capt.Alabama_Sniper .............................