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For: G&G 6mm Metal Bushings w/ BearingsProduct Information:
I installed these into a Double Eagle UMP V2 gearbox, replacing the plastic bushings. At first glance, these look good, but they did not fit the gearbox very snugly at all. It was a rather loose fit and keeping the gears still while putting the gearbox back together was very difficult, mainly with the anti-reversal latch pushing the bevel gear out. These are ball bearing and do spin well, but installation was difficult. After lubricated properly however, they work fine.
Allows gears to move easier
Does not fit gearbox frame securely
Gears will wobble or feel loose during installation