Maelstrom - Straight Blowback MAC-11 Upper - 5.5" 9mm
RELEASE DATE TO BE DETERMINED
Product Description
You are currently viewing the Maelstrom (Straight Blowback). Looking for delayed-blowback operation, check out the Maelstrom Pro!
The Maelstrom modernizes the MAC-11 platform while preserving traditional straight-blowback operation. It is designed as an upgrade for compatible MAC-pattern lower platforms, including traditional sheet-metal lowers and modern machined lower designs, while maintaining compatibility with standard full-size MAC-pattern bolts.
Built around the simple and proven straight-blowback operating system, the Maelstrom is generally more tolerant of variations in bolt geometry, recoil spring force, and manufacturing differences between bolt manufacturers. This makes it a straightforward option for users who want a modernized upper without the additional bolt and recoil-spring considerations associated with delayed-blowback operation.
Unlike traditional sheet-metal uppers, the Maelstrom features a fully machined monolithic upper, a continuous Picatinny top rail, and a folding non-reciprocating charging handle. The result is a modernized upper assembly that combines improved ergonomics, modern optics compatibility, and traditional straight-blowback simplicity in a single package.
No proprietary bolt is required.
Uppers ship fully assembled. Bolt not included.
Download the Maelstrom Upper Owner's Manual
Specs & Features
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Traditional straight-blowback operating system
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Upper and charging handle machined from billet 6061 aluminum
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Cerakote Gen II Graphite Black (HIR-146) finish
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17-4PH stainless steel trunnion and charging handle carrier, heat-treated to H900 condition
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5.625" barrel with Black Nitride finish
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1:10 twist rate
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1/2x28 muzzle threads
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Continuous monolithic Picatinny top rail
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Folding non-reciprocating charging handle
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Compatible with standard full-size MAC-pattern 9mm bolts
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Compatible with standard and dual-feed magazine configurations
What's Included
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(1) Maelstrom Straight Blowback MAC-11 Upper - 5.5" 9mm
A Note on Cerakote Finish: Due to our manufacturing process, individual components are coated and cured separately. While we maintain strict quality control standards, minor variations in color and sheen may occur between mating parts. You may also notice lighter coating coverage in tight internal geometry; any lighter coverage in these hard-to-reach areas is purely cosmetic and will not compromise the function of the part.
