Why do stock lower arms on MJX 10303 break easily?

The easy damage of front and rear lower suspension arms on the MJX 10303 is a major concern among RC hobbyists. If the stock plastic lower arms of your MJX Hyper Go 10303 keep breaking during bashing, the main cause is that the factory plastic compound is formulated for balanced lightweight performance with limited impact resistance. Hard landings after jumps, direct collisions and repeated stress cycles will create stress cracks on the arms. In addition, improper suspension gap, worn pins and aggressive power upgrades add extra load and speed up fractures.
Replacement becomes necessary once they get broken. If you love jump bashing and off-road running, you can upgrade to metal lower suspension arms. They feature a longer service life and lower long-term replacement cost.
If you want to buy front and rear lower suspension arms, click here: MJX Hyper Go 10303 Upgrade Parts Front Lower Suspension Arms and Rear Lower Suspension Arms.