→ Stronger spring to avoid double feeding → CNC Machined aluminum BB stopper This is an upgrade part for standard SSG10 / VSR10 hopup chamber to avoid double-feeding on stronger magazines like Action Army VSR10 50rd or when using high capacity M4 midcap magazines using our M4 Adapter. Made out of CNC machined aluminum. The spring can also be used by itself on the stock SSG10 plastic BB stopper as well. This upgrade might make the replica slightly louder due to metal-to-metal contact between BB stopper and cylinder head.
