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TiNi coating on M4 gas pistons?

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Hey. I wanted to get sone opinions on getting my M4 gas pistons coated in TiNi or anything coating i just perfer TiNi. I plan no getteing the bolt carrier coated at aome point but also want to do the pistons. Making them easyer to clean and more durable.

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How thick of a plating is it? When I had Nickel Boron applied to a set of pistons, it increased their diameter and I was forced to fit them to the barrel assembly. My experience with NP3+ on the pistons has been better. I guess they're thinner of a surface finish.

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