Full metal upper and lower receiver with stamped APS trademarks and markings 10" Evo-Tech 3.0 full metal M-LOK handguard allows for easy integration of any M-LOK accessories New eSilverEdge geaarbox featuring advanced S.D.U. chipset to manage shot-to-shot amperage draw (gearbox only pulls 11amps at ~380 FPS) for improved consistency, performance, and instantaneous trigger response making this one of the most efficient stock gearboxes on the market Flip up front and rear APS rhino back-up sights 5 position low profile RS2 stock Ergonomic motor grip FPS Range: 370-400