Nexxus HPA Engine for M4/M16 Airsoft AEG Variants

Key Feature Full mechanical engine capable of firing in both Semi-Automatic and Full-Automatic modes No batteries required; simply connect your HPA tank for operation Features an ultra-fast trigger pull for responsive shooting Highly efficient on air, providing up to 3000+ shots with a full 48/4500 tank Ready to attach to your external HPA regulator setup Optional kit available for running a shoulder stock tank with a built-in regulator Embrace the HPA revolution with Mechlabs and enhance your airsoft experience! Suitable For M4 Series V2 AEG Electric Gun Airsoft Rifles