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"Eric B.- The best Pinion Gear you can get is probably the Guarder steel ones. They are great quality.
This motor may be expensive ,but will turn your gun into a beast if you have a good setup!
"wow nice motor but good lord what was systema thinking with that pinion gear. It's been eaten alive after like 5k rounds put through it. It's a good thing the gb was shimmed right otherwise it probably would have exploded really easily. I mean WOW the pinion gear on this motor is crap. Just replace it right off the bat don't even bother with it at all.
"I got this motor with the Systema m170 gearbox package. While both are great the motor has one big flaw, which is the pinion gear. I installed the new gearbox and motor into my metal body M4 and was signing in my scope and after less than 500 rounds I heard a whine and the gearbox lock up on me. So it took out the motor and saw that one of the pinion gear teeth had broken luck I could see it from the motor hole in the gear box and could retrieve it with a magnet.
The motor it self is great but, I think the extra hard material that Systema uses for the pinion gear it to brittle. I fully plan on replacing the pinion gear so I can use this motor but for now I have a back in the gun which is a Guarder Infinite Torque-Up Magnum which I had in my MP5 that has a upgraded gear box with a M130 spring.
If anyone knows what the best pinion gear is let me know.
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