Features of Classic Army CA MK16 Long (CA020P-B) - Fore-grip Rails for accessorizing, and Scope Mount Base - 9mm Bearing Bushing Advanced Version 2 Gearbox with High Performance Motor - High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston - Metal Adjustable Front and Rear Sights and CNC Upper Receiver with Unique Serial Number - High Strength Polymer Construction Lower Receiver and Tactical Side-Folding Stock
Features of Classic Army CA MK17 Heavy-SSR (CA099M) - 23inch Long Top Rail provide more than enough room for optic & other accessory - 9mm Bearing Bushing Advanced Version 2 Gearbox with High Performance Motor - High Quality Steel Gears, Gearbox Shell, and a Polycarb Piston - Metal Adjustable Front and Rear Sights and CNC Upper Receiver with Unique Serial Number - High Strength Polymer Fiber Construction Lower Receiver and Tactical Side-Folding Stock