Aftermarket O-ring kit +
Washer Firing Valve Seal LB5005 (These are 3D Printed Parts)
+ Bumper BB0147
For Make: Senco
For Model: M1 M2+ M3+ SC1
This kit only works with the tools listed. (The Bumper BB0147 Does NOT work with the M3 with no + Models, MW or the SC2)
If you have any doubts if this kit will work with your gun, contact me through the Ask Seller a Question link below.