Throw Lever (quick zoom change) for Ø42mm ring diameter

Always wanted a throw lever to quickly change the zoom level on my Vortex Crossfire 3-9x40 scope, so I made one. Actually two, one with a straight lever and one with an angled one to interfere less with the bolt handle (see images).

My rifle is a Ruger American Rimfire 8366 and the lever works just fine, but I guess there might be issues with other makes/models.

This uses a metric M3x25 screw and corresponding nut, however the hex cut in the print itself didn't sufficiently grab the nut for tightening all the way so I had to use little pliers.

This should fit any scope with a zoom ring of about Ø42mm - for other dimensions you might try scaling. Please bear in mind though that the screw hole might need adjusting if you choose to do so.

Printed this with 4 walls and 20% infill, as I've been having issues with uneven numbers of walls - should work fine with 2 walls though because there's not really much load on it.

Please handle your scopes with care and respect - I cannot take responsibility for any and all damages you might cause installing this lever.