501 Stainless Steel .22 Bolt Probe. SMK 501 Stainless Steel Bolt Probe with longer probe nose of just over 1mm + so you can blueprint your Bolt Probe to Pellet for greater efficiency.

I will also put the bolt seal on the probe.


The bolt has the same threaded hole for the adjusting grub screw and pad, if you want the grub screw and pad as wll then I have put that option in the option tab below.
This adjuster is used to take up any slack in the bolt clearance so the bolt will not rattle.