Having good compression in your gun improves efficiency and accuracy

and receiver

5mm hex key

260° Peripheral vision

Speed Airsoft Tunable Trigger Black HPA M4 Blade HK Army Having good compression in yourThe new SPEED Airsoft HPA MOSFET M4 triggers released are designed to work with Polarstar HPA conversion systems. The SPEED HPA MOSFET M4 triggers incorporates dual adjustment set screws which will enable a trigger pull under 1mm with ease. The SPEED HPA MOSFET M4 triggers also includes a specially designed coil compression spring that reduces the pull tension, so players with the Polarstar systems can rip off lightning fast strings easily even in