NOTE: Some XCR-M Mini uppers may not be compatible with the 8.6 Blackout caliber. To see if your upper can accept an 8.6 Blackout conversion kit, check HERE.
Current Caliber none
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Current Barrel Length none
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Current Gas Block none
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Current Gas System Length none
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Current Brass Deflector none
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New Caliber none
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New Barrel Length none
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New Barrel Twist none
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New Barrel Contour none
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New Gas System Length none
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New Gas Block none
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New Muzzle Device none
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New Oprod none
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New Gas Tube none
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Brass Deflector none
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Total: