Surefire muzzle device after opening the factory hole, and countersinking it.
A tap was run inside the muzzle device after drilling, to clean up burrs in the threads.
Muzzle device installed on barrel, blind hole located and drilled in barrel.
A 3/32” x 1/4” 18-8 stainless steel down pin is seated firmly, then trimmed to length.
Once everything is in order, it is all disassembled, thoroughly degreased, and reinstalled with Rocksett.
Then it’s off the the TIG welder to finish the job.
All done.
SEMPER FI!
