I recently bought this motor for my TM MP5K to boost the firerate, and this definitely boosted the firerate!
When i first tested it with a 63 amp 11.1v li-po it instantly stripped the CA piston i had in the gun. You'll need a strong piston with the AOE corrected for this kind of speed. This will pull an M120 spring on 18:1 ratio gears at 36rps with an 11.1v li-po with a trigger response rivaling that of a GBBR.
This is a very hungry motor though, you can forget running this with a mini-type ni-mh, i recommend using a li-po to power this beast. It runs a bit hot and is bit expensive, but the pinion gear is very durable.
Overall i'm very pleased with this motor. I run the short type in my upgreaded CA AUG, and the trigger response is ridicously quick. There are cheaper alternatives that will have similar performance, but this was the best motor i could buy from domestic retailers in Norway.
Lots of torque
Very fast for a high torque motor
Good pinion gear
Well built with ball bearings and the works
Very strong magnets
Low efficiency, this thing eats batteries, hehe.
Runs a bit hot but, not so bad it will cause problems really.
Kinda expensive, but alot cheaper than Systema motors.