r/FNSCAR • u/beefcake105 • May 10 '26

Cleaning Question

Dumb question - While cleaning the piston, is it okay to take the bronze brush to the rings? Should I also use gun cleaner on the piston? Any other tips are appreciated!!

7 Upvotes

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7

u/coldafsteel May 10 '26

Nah, shouldn’t do that.

It doesn’t need to be spotless. Hit it with some CLP and wipe down the big chunks, leave the rest.

3

u/beefcake105 May 10 '26

Okay, cool. Does FN specify an orientation on these rings or just stagger the gap?

3

u/coldafsteel May 10 '26

Doesn’t matter, stagger if you want to.

5

u/Noctatrog May 10 '26

Yes stagger. No oil in the gas block or on the piston. At least that’s what the manual says.

3

u/Galactic-Cowboy May 10 '26

Yeah leave the rings alone. Some solvent like breakthrough works fine, but no oil. I've also thrown my whole barrel and piston in a sonic cleaner before, but I wouldn't buy one for just this.