||Great motor. This can pull a M120 spring, just use a strong 9.6V battery or 11.1V lipo.
I used this motor with 13:1 ratio shs gears and a M120 spring. At first, my 7.4V lipo or 9.6V Ni-MH battery could barely pull this setup, but after switching to 11.1V lipo this solved my problems. Now my ROF increased from 15 bbs to 33bbs!
-Pinion gear is not as strong as I would like it to be (after less than 5,000 rounds the pinion showed signs of wear and tear). I recommend replacing it with a stronger one.
OVERALL this is a great motor if your looking to increase your ROF. Just to note, increasing ROF by switching to this motor will not increase your FPS.
I RECOMMEND YOU BUY THIS PRODUCT NOW!
Rating: [5 of 5 Stars!]