Replace the plastic mag release with a stronger metal one.
Selected materials, grade quality
.Suitable for JM 8/JM 9/XM316/Heiniu Receiver,but pay attention to the installation on a JM 9 there will be a small gap, but can be used, perfectionists please be careful when buying
.More durable after replacement, and smoother when removing magazine clip
Assembly required please be advised when doing yourself.