FN HERSTAL-LICENSED SCAR-SC COMPACTFeatures Fully licensed replica of the FN Herstal SCAR SC Compact PDW High quality full metal upper receiver and polymer lower receiver, just like the real rifle Features the unique ARES Electronic Fire Control System (EFCS Safe Semi 3rd Burst Full Auto) Gearbox, programmable via the EFCS control box (sold separately). The gearbox is also an advanced, reinforced design with a quick change spring system. Compared to its bigger brothers, the compact PDW