Sig Sauer P365 X Macro Fuse FLUX 9mm 25 Round Extended Magazine Black 8901941 UPC 798681729746
Product Description
The Sig Sauer® P365-XMacro / Fuse / FLUX 9mm 25-Round Extended Magazine (SKU: 8901941 / UPC: 798681729746) represents the maximum factory-engineered firepower configuration available for the groundbreaking P365 modular family. Engineered specifically for extended range sessions, high-volume tactical drills, competitive shooting, and secondary staging in PDW configurations like the P365 FLUX Raider, this OEM magazine upgrades your payload to 25+1 rounds while preserving the unmatched feeding geometry and reliability of factory Sig Sauer engineering.
Constructed from heavy-gauge, heat-treated carbon steel, each magazine tube undergoes robotic laser-seam welding and precision stamping to eliminate internal drag and binding. The exterior and interior surfaces are treated with Sig Sauer’s advanced black anti-friction coating, which actively sheds carbon fouling, repels range grime, and provides exceptional resistance against environmental humidity, sweat, and caustic cleaning solvents. Inside, a high-yield, fatigue-resistant tempered spring works in unison with an anti-tilt polymer follower to maintain consistent upward cartridge tension from the first round loaded down to the last slide-lock ejection.
Ergonomics and positive physical index points are prioritized through the integrated glass-reinforced polymer baseplate sleeve. Form-fitted to match the contours of full-length P365-XMACRO, P365-AXG Legion, and P365-FUSE grip modules, this extended collar prevents magazine over-insertion—protecting your firearm’s ejector from catastrophic damage during aggressive reloads. Deep rear witness holes provide instant payload verification, making this high-capacity magazine an essential loadout component for serious shooters seeking sub-gun round counts in an ultra-compact footprint.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct engineered fit for Sig Sauer P365-XMACRO, P365-FUSE, P365-AXG LEGION, and P365 FLUX chassis systems. CRITICAL: While mechanically functional in standard P365, P365X, and P365-XL frames, an exposed portion of the metal magazine body will remain visible above the extended polymer collar. NEVER slam an extended magazine into a host without an intact baseplate stop, as over-travel can bend the internal ejector. NOT compatible with .380 ACP P365 variants or P320 platforms. Due to high spring tension when brand new, magazines may require a dedicated loading tool for rounds 23 through 25 until spring coils take initial compression set.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
- Inspect the 25-round magazine feed lips for true parallel alignment and confirm the follower moves smoothly without binding against the steel walls.
- Load ammunition into the magazine, ensuring each cartridge is fully seated rearward against the back spine; utilize a speed loader if necessary for the final 3 rounds.
- Insert the loaded magazine firmly into the grip well until the steel magazine catch engages with a sharp, positive audible and tactile click.
- Manually cycle the slide or utilize the slide catch to chamber the primary round, verifying smooth feed ramp entry and positive extractor hook engagement before staging.
Key Features
- Factory 25-Round Extended Capacity: Delivers submachine-gun payload capability directly to your standard P365-XMACRO, Fuse, or FLUX platform.
- Heat-Treated Carbon Steel Construction: Rigid stamped steel housing resists impact deformation and maintains critical feed lip dimensions under hard duty use.
- Proprietary Anti-Friction Coating: Ensures ultra-smooth magazine drop-free releases and eliminates internal friction during high-speed feeding.
- Integrated Over-Insertion Collar: High-impact glass-filled polymer sleeve aligns flush with full-size P365 grip frames, preventing ejector impact during emergency reloads.
- Anti-Tilt Polymer Follower: Stabilizes each cartridge presentation angle to prevent nose-dives and feeding stoppages.
- Rear-Facing Witness Inspection Holes: Machined calibration ports permit rapid visual inventory of remaining round count.
- High-Tensile Tempered Spring Wire: Maintains uniform feeding pressure through thousands of operational compression cycles.
Product Specifications
- Brand: Sig Sauer®
- Model/Series: P365 Extended Magazine
- MPN / SKU: 8901941 / SIG-8901941
- UPC: 798681729746
- Platform Compatibility: Sig Sauer P365-XMACRO, P365-FUSE, P365-AXG LEGION, P365 FLUX Raider (also fits P365 / P365X / P365-XL)
- Country of Origin: United States
- Caliber: 9mm Luger (9x19mm Parabellum)
- Capacity: 25 Rounds
- Body Material: Heat-Treated Carbon Steel
- Body Finish: Anti-Friction Black Oxide / Nitride Coating
- Baseplate / Sleeve Material: High-Impact Glass-Reinforced Polymer
- Follower Material: Low-Friction Anti-Tilt Polymer
- Spring Material: High-Tensile Music Wire / Tempered Spring Steel
