BLACK NITRIDE (Melonite) BCG rated full auto.
Black Nitride is a process commonly referred to as SBN (Salt bath nitride) and QPQ (quench polish quench). These are a form of nitrocarburizing or a Thermo Chemical treatment that improves wear resistance and corrosion resistance of ferrous metals with little or no dimensional change which causes the hardening of steel. The chemical bath results in a deep dark black with a harder, more durable finish. 5.56 / .223 / 300BLK More information or to order online please follow the link below.
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CARRIER SPECIFICATIONS
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Material: Domestic Aircraft Quality 8620 Steel
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Gas Key: 4130 Steel: Grade 8 Gas Key Screws (properly staked)
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BOLT SPECIFICATIONS
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Bolt Material: 9310 or C158
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Extractor Material: 4140 Steel
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Mil-Spec O-Ring
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Mil-Spec Gas Rings (3)
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Cam Pin Material: 4140 Steel
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Firing Pin Material: Hard Chrome/Ground 8740
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Other: MPI Tested, Shot Peened
- Lifetime warranty from Toolcraft, the leader in BCG manufacturing.