I must say I am very disappointed with modify modular smooth torque gear set.
After receiving a long awaited package from USA and trying to spin the gears in my hand it made quite a sharp sound instead of being quiet as I expected. The gears have also some will, between each other approx. 1 mm and one wheel is almost touching a second wheel. I was a bit disappointed with overall quality. But even bigger surprise was after installation (M135 spring). It makes a horrible sound. It so loud that you can’t have your gun on your shoulder otherwise you will get deaf. It is very sharp noise. Even after lubing there was no difference at all.
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