Originally Posted by brently0725

I put a vise grip around my old gear and used a small punch to punch out the shaft thru the gear.

To install the new gear all I did was lightly tapped it with a hammer.

For those who might say I was stupid to do this, save your breath because I had no access to a gear puller or a gun doctor at the time.

And it is still running great to this day.

It was on my TM MP5 SD5.