The short style SHS High Torque Motor has a high strength stator magnet which greatly increases torque. We highly recommend this motor if you are upgrading your spring or installing a high speed gear set. Or, if your stock motor is getting old or generating too much heat, this motor is a great replacement. It is a low cost equivalent of most other ultra-torque motors. The short axle on this motor makes it compatible with most Version 3 guns. (please note: packaging may be generic or labeled as 'Rocket Airsoft'). New style with new springs included. These are updated for 2017.