Sunday, November 7, 2021

Hammerli Palm Shelf Addendum

Most of my airgun projects are driven by the need to solve perceived problems or annoyances.  I have a lot of air pistols with anatomic target grips and I've noticed that the palm shelves on some guns will occasionally move slightly unless the mounting bolt is pretty tight.  I wondered if there was a way to lock the palm shelf in position without resorting to cranking the bolt to the limit of torque.  To be sure, some of the guns can benefit from tightening the clearances between the main grip and palm shelf.  Others, not so much.  Anyway, here's a quick modification that I found beneficial.

















Came across a few 3/8" diameter rubber discs. 
















These are 1/8" thick.














I milled two 0.375" diameter pockets about .100" deep on the inside of the Hammerli's palm shelf.  A pocket on each side of the mounting bolt.






 











The rubber washers push in and barely stand proud.













The amount they stick out is adjustable by cutting to different depths and/or shimming















The shelf now locks in place at substantially less bolt torque.  Roughing up the rubber discs with some sandpaper would've probably also helped.


More soon.