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Kjw m4 piston cup
Stock pistons cup starting to ware out .
Any ideas if a guy should get another stock one or get a different brand ?
Any thoughts or ideas would be awesome. !
What is the big hype about the hop up rubber
If mine wears out Do i get a new stock one or buy a different brand of hop up rubber???
Im lost here any help would be sweet ?
Oh one more question when bolt wears out should a guy get another V2 bolt or the V1/2 bolt from cradel soft ?
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