Source-VVIP weapons were updated in CFQQ 2 months ago. S-V weapons are VVIP weapons without EXP/GP bonus and certain features such as ammo addition, also without V mark in game, just like AK47-Beast Punk and their Noble Gold WS counterparts. Players can exchange Source-VVIP weapons with "piece" through a web event named piece system, and thus those weapons are named XXX-piece in bag selection interface in gameplaying. Players can buy coupons to get pieces in vary amounts or obtain pieces in small amount in some events before.
In CFQQ 10th anniversary event, players can get 210d Source-M4A1-Iron Beast and 64 pieces for it by playing a game per day for 5d, as long as they play a game per months in next 5 months, they can get another 64 pieces(13 pieces per month) and exchage a permanent Source-M4A1-I.B. with 128 pieces.