Originally Posted by OKFC05

It helps if you clean the gun within a day or so of shooting before all that fluffy fouling turns to stone.
Field strip per manual.

CRC Silicone spray, cotton cloth, old tooth brush, Q-tips.
Spray the silicone so it washes the loose stuff out of the gun, not down into the crevices. Wipe and brush to remove stubborn stuff. Spray again and let it run out.
Same treatment for the synthetic linkage in the frame.
Disassemble magazines, spray, wipe dry, and reassemble.


By the time you clean the barrel and grooves on the slide, the silicone propellant (Heptane, or white gas) will be gone. Powder solvent, bore brush, patches. I bent (boiling water) and ground the end of an old toothbrush to fit the grooves in the slide.

Lightly lube frame points, rub areas on barrel (I use action grease) and put a drop of Remoil on the sear contact surface.

Assemble Sigma. Elapsed time: 10 to 15 minutes.

Hope these tips are of use to you.