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· Premium Member
602 Posts
I attached a picture of the piston. It's got a built in piston head and it's quieter. Other than that, it's the same thing.

I'll have to chrono the springs for you since they're unmarked and need to locate the spring guide that I *think* I have.

I'll also have to look around for a barrel. I know where the stock barrels are but have to see which TBB I have laying around. What length specifically are you looking for?

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