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cleaning the gas piston

  1. RFB High Efficiency Rifle
    Hi. I am a new RFB owner and I bought it second hand. When I bought it the gas adjustment was about 27 clicks. I cleaned it several times but only the last 4-5 times I cleaned the piston with a bras brush. The first time I cleaned it the piston was very hard to take out. Now it is a bit easier...
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