These are super simple guns to work on.
You can also buy this O-ring kit below.
RN-312 Bumper below
Hilti RN312 O-ring Kit + Bumper
For the Hilti RN312
Complete O-ring kit
Bottom Bumper #163
Also available on eBayAvailable Qty: 1
Kits + out of production parts
These are super simple guns to work on.
You can also buy this O-ring kit below.
RN-312 Bumper below