Colloidal Graphite in a isopropanol carrier. This is a dry film lubricant. This is the product that I coat every new barrel with that I install. This product fills the micro structure. So you have a graphite lubricant in the micro structure, instead of copper and carbon. This helps to prevent the fowling from sticking to the bore, and get a longer shot count before needing to clean.
I break in all my barrels by coating after every shot & cleaning. This makes sure the micro structure is filled in. I have a 17 Ackly Hornet that I put over 1400 rounds through this summer & fall on squirrels, and have not cleaned it yet because I'm still hitting what I shot at.
2oz Bottle

GRÄ’-TAN RIFLES

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How to choose a Firing Pin Assembly
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You need to know only three things, to choose the right assembly.
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1.Fluted or Lite
2.Color Bolt Shroud: Satin Black, Matte Black, or Matte Silver
3.Length: Long, Short or Model 7
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They are all of equal quality and performance:
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The difference between the Lite and Fluted:
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Lite: Has a faster lock time, for Tactical, PRS, NRL and Palma style competition shooters and if you take moving or running shots say at coyotes, you may want to think about a lite. The only time we suggest not buying one is if you hunt in extreme cold. Our lite pin has an aluminum shaft, and a hardened steel tip that makes it lighter in the rifle, creating a faster lock time.
Fluted: Our fluted pin performs extremely well. It is made of one complete piece of hardened steel with flutes in the shaft to lighten the pin and help with lock time.
And lastly you want to choose your Color and Length.
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I hope this helps. It can seem like we have so many choices on our website, but it really comes down to three things.