MAC Defense Industries - Our black nitride coating gives zero cares about moisture, sweat, solvents, or anything else you throw at it. Add it as an option for a few bucks more
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MR920 Combat custom milled by Maple Leaf. Stonewashed black nitride coating. Timney trigger with Johnny Glock combat mod. : r/shadowsystems
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ZEV SLDZ193GDUTYRMRBLK Duty RMR Stripped compatible with Glock 19 Gen1-3 Black Nitride 17-4 Stainless Steel | Range USA
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Spike's Tactical AR-15 .625 Diameter ST Micro Gas Block Solid Billet Steel Black Nitride Coating Matte Black Finish | Cheaper Than Dirt
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