RST LRC A13 Upper Receiver Kit for CYBERGUN / VFC MK17 GBB Airsoft

Length : 609 mm Handguard length : 13 Inch Weight : 1443g Free floating barrel Heavy duty gas block prevent the barrel from accidentally hit during intense operation Non-Reciprocating charging handle 8mm ball bearing increase the smoothness of operation and reduce gas consumption Enhanced Hop-Up adjusting screws prevent loosening under continuous impact