what is the best way to clean gas piston and piston housing SCAR 17S

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Thread: what is the best way to clean gas piston and piston housing SCAR 17S

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    Junior Member jasonmwillis's Avatar
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    what is the best way to clean gas piston and piston housing SCAR 17S

    so i took out the gas piston after about 400 rounds, and the manual says no lubricants, just wipe it off with a cloth, yeah right!!! so i did and i know it can be a hell of alot cleaner, what are some of the better ways to really clean the piston and housing, and how often?? thx! housing being gas block


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    I soak my piston in solvent overnight, pull it out and scrub it with a GI nylon "toothbrush" wipe it down with a lint free cloth and viola!

    I only soak it just in case there is crud in my gas ring I can't see


    I use a Glock nylon cleaning rod/brush for the gas cylinder with the same solvent and then blow it out with compressed air.


    I don't actually think this level of detail is needed but I can't help but want to clean it and that's the only part of the system with any appreciable amount of dirt the rest of the weapon is just a wipe down/regrease/reassemble sort of affair.

    Just make sure whatever solvent you use is residue/oil free so it doesn't cause your gas system to coke up and stick your piston(same deal as an M240 MG).
    Last edited by Fröman; 09-30-2014 at 12:52 PM.
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    Senior Member CPTdaz's Avatar
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    You can use a scar carbon scraper or use solvent then wipe it clean before reassembly. If you want to follow the instruction to the t and don't want to risk leaving any trace of lubricant then I recommend frog lube cleaner; not sure what's in it but it's a water like substance that loosen carbon really well without being greasy. And unlike most of the solvent out there it doesn't lubricate or leave any grease behind (dries like water too).

    Personally I clean it with fireclean and leave the film of grease on so the next clean up is easier.
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    "And here remain with your uncertainty! Let every feeble rumor shake your hearts! Your enemies, with nodding of their plumes, fan you into despair! Have the power still to banish your defenders; till at length your ignorance, which finds not till it feels, making but reservation of yourselves, still your own foes, deliver you, as most abated captives to some nation that won you without blows!"

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    I will do what I usually do with my AK piston : I put the wire wheel brush on my bench drill press and I start cleaning it with it . it will eat out the carbon , powder residue , etc . Since the piston is made of high grade carbon steel , the wire brush would not do anything to it . It Is just like cleaning the valves of an engine . After that , spray some brake cleaner to eliminate any oil , dry it with a clean cloth ... you are done.
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    Boretech eliminator on a nylon gi brush works quick. I just dry it off with a rag and re-assemble. Havent had any issues yet.
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    Kano Kroll oil and a brillo pad.. Like the ones for the AR bolt cleaners from Midway usa
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    Senior Member bayonet14's Avatar
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    +1

    Or do a 3 to 1 Kroil and Shooters Choice

    Use some down the barrel and let it soak (overnight) if you can

    Once piston is clean - do not use any lube .... re-install dry
    Last edited by bayonet14; 09-30-2014 at 07:45 PM.
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    Steel wool.

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    STL
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  11. #10
    Junior Member jasonmwillis's Avatar
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    will regular hoppes bore cleaner work to soak it in?

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