There is a different liner lock for each caliber (part 10 on the M3 barrel kit diagram https://fxairguns.com/wp-content/uploads/2021/04/F10373-pipkit-impact.pdf). The .177 and .22 versions have two orings inside (part 11 in diagram). The .25 and .30 do not.
I have a .22 and .30 M3, both using carbon liner sleeves. The .30 with no orings is more repeatable. When I tighten the liner lock down, the liner stays put where I have it indexed. Zero is very repeatable when pulling and reinstalling the liner, usually only one click on the scope if any. Last time I reinstalled it, it was dead on, no adjustment needed.
The .22 liner lock with orings wants to spin the liner when I tighten it down. This makes maintaining liner index point difficult. I installed one OEM liner oring in front of the carbon sleeve to add some rotational friction to the liner and this helps hold the liner in place. Overall, the .22 liner lock with orings seems to cause more headache and zero is less repeatable.
Anyone have ideas why this difference exists? I'll take metal on metal for centering and securing the liner end any day. If someone made an oring-free .22 lock I'd buy it in a second.
I have a .22 and .30 M3, both using carbon liner sleeves. The .30 with no orings is more repeatable. When I tighten the liner lock down, the liner stays put where I have it indexed. Zero is very repeatable when pulling and reinstalling the liner, usually only one click on the scope if any. Last time I reinstalled it, it was dead on, no adjustment needed.
The .22 liner lock with orings wants to spin the liner when I tighten it down. This makes maintaining liner index point difficult. I installed one OEM liner oring in front of the carbon sleeve to add some rotational friction to the liner and this helps hold the liner in place. Overall, the .22 liner lock with orings seems to cause more headache and zero is less repeatable.
Anyone have ideas why this difference exists? I'll take metal on metal for centering and securing the liner end any day. If someone made an oring-free .22 lock I'd buy it in a second.