Unobtanium Posted August 13, 2008 Share Posted August 13, 2008 How often should these be replaced on the gas-pistons? Or is this like H&K's O-rings on their barrels and I will wear the gun out before I need to replace it? Anyone ever need to replace it and if it DOES fail, with the weapon still function, just without the safety of being able to vent excess gas, or will it short-stroke? Quote Link to comment Share on other sites More sharing options...
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