Our preferred 8.6 Blackout platform...accurate, reliable, lightweight!
We start out with a Sig Cross Trax, headspace our premium 416R 8.6 Blk 1:3t nitrided barrel, or 8.6 Blk 1:5t bead-blasted barrel, install a B5 K22 grip, and top it off with a CherryBomb XL and voila! No fancy marketing hype here! (for 8.6 Blk we only offer the M18x1.5 Q taper thread)
Nitrided Barrel Specs;
Our barrel is a high-end premium 416R stress-relieved button-rifled 1:3t blank that’s CNC machined on a Mori Seiki lathe, chamber is precision dialed in and chambered concentric to bore with our Alpha reamer guaranteeing the lowest runout, threaded M18x1.5 Q taper, or 3/4x24 square shoulder, precision square-cut crowned, and finally black Nitrided (1:3t Only).
Nitrided barrels are treated through a thermochemical process that diffuses nitrogen and carbon into the steel's surface.
The primary benefits of nitrided barrels include:
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Superior Accuracy: Unlike chrome lining, nitriding is a surface treatment rather than an additive coating. It does not change the barrel's dimensions, preserving the precise rifling and bore geometry as they were machined.
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Extreme Surface Hardness: The process creates a hard "skin" (often up to 60-70 HRC) that is as tough as tool steel. This significantly reduces throat erosion and wear on the rifling lands.
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Comprehensive Corrosion Resistance: Because the barrel is submerged in a chemical bath, both the interior bore and the exterior surfaces are protected. This treatment is extremely resistant to rust and often requires less oil for maintenance.
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Increased Lubricity: The treatment lowers the coefficient of friction within the bore. This leads to less copper and carbon fouling, making the barrel significantly easier to clean—often requiring only a simple wipe-down.
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Heat Resistance: nitriding offers excellent heat resistance for semi-automatic and rapid-fire strings, maintaining accuracy longer than untreated steel.
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Fatigue Strength: The process can improve the fatigue life of the steel by 30% to 100%, making the barrel more resistant to structural failure under stress.
