Rifle Scopes Adding "grip" to the Leupold M3 knobs.

[captnmo]

I've got a Leupold Mark 4 with M3 knobs with elevation calibrated to the M118 175gr. After adjusting, it seems I have to really wrench down on the three screws that hold the knob in place after zeroing. They snug up against the turret which seems to be a real smooth stainless steel or aluminum. My problem is, they seem to slip since there's no real grip between the surface of the screw and the surface of the inner turret.

Has anyone modified these screws to add grip? My thought was put a dot of silicone or something "rubbery" to give the screw just a bit more grip on the turret when I turn it. Your thoughts?

Some photos to better explain what I'm talking about.

 

[dbsinh2o]

Re: Adding "grip" to the Leupold M3 knobs.

Call Leupold and tell them you have knobs with small set screws, and you need the new style knobs with #10 set screws.

I've been through this, as the small set screws like you have shoot loose on my M1A. The #10 screws use a larger allen wrench, so you can properly tighten them.

They offered to replace mine if I sent them back, but I just ordered new knobs as I didn't want to be "knobless" while waiting for the replacements to arrive.

I later ordered a 7.62mm 168gr. BDC knob, and the first one that arrived had the small screws as well. I did send that one back for a replacement knob with the #10 set screws.

 

[captnmo]

Re: Adding "grip" to the Leupold M3 knobs.

Good to know. Thanks!