Gas Piston Cleaning and End-Coating

[cetane]

There is no question the FN piston system rifles do not need to be cleaned often at all. This does not mean that you should not clean them. There is no question about cleaner IS better. I am lazy and dont clean mine every time I shoot. That is because I just dont. If you have the time and ambition you are only better off to clean them every time you shoot. If at least they are guaranteed to function 100 percent when you take them out to shoot. The other side is you do a detailed cleaning, and find something loose or worse broken. You have then avoided a real potential problem, that could actually blow up in your face. Better to be safe than sorry. Better to be sure of your equipment than not.

[CountryBoy]

Guys, I wouldn't use Scotchbrite on this and I'll tell you why. Scotchbrite has abrasives in it that most likely are harder than hard chrome, and eventually you'll round surfaces off that don't need to be rounded off, etc.

Do what pazzo does (and I do too) and use a razor, an old knife, or the brass part of a stripper clip (old .mil trick) and scrape carbon off. Use cleaning tools/supplies that are softer than your steel and you'll be good to go.

They don't need to be pretty, just crust-free.

The only thing that seals on a piston like the scar is the 3 rings.

Like sarge said scotchbrite is fine and is what FN uses in house. I would know

[SgtStrykerUSMC43]

The only thing that seals on a piston like the scar is the 3 rings.

Like sarge said scotchbrite is fine and is what FN uses in house. I would know

CB!
Good to see you posting again, my friend.

Yes, you would know!

...Probably still have dreams about green Loctite, ay?

Don't be a stranger, okay?

[Ferris2son]

HE'S BACK!

[SONYtec]

Wecome back CB.

[7.62GUNR]

Last time I checked, every green ground-pounder learns how to use weapons designed and manufactured by civvies, in basic.

Thank you very much.

You wouldn't know......you have never been in the military OR worked for a MILITARY weapons manufacturer(DSA don't count)

[SgtStrykerUSMC43]

You wouldn't know......you have never been in the military OR worked for a MILITARY weapons manufacturer(DSA don't count)

And you've never designed or manufactured a single weapon component, and your marksmanship skills are slightly above average. What's your point?

There are a number of current and former professional soldiers on FNF I get along with and there's mutual respect among us.

So, why is it that you've taken such a liking to me as of late?

You seem to view me in a certain light and I'm curious as to why that is...

[7.62GUNR]

I ran a CNC turret lathe at 19 years old......it's pretty hard to impress me with slapping together a parts kit.

[SgtStrykerUSMC43]

I ran a CNC turret lathe at 19 years old......it's pretty hard to impress me with slapping together a parts kit.

I'm not here to impress you.

My 8 year old can run turning and milling centers.


SO, again, why have you taken such a liking to me?

[7.62GUNR]

I'm not here to impress you.

My 8 year old can run turning and milling centers.


SO, again, why have you taken such a liking to me?

Oh, I'm sure anyone who can press the start button and step on the check release can run a CNC once your CAN is loaded and tools are touched off......
And I never said I liked you.