FAB Defense Mojo Magwell with Spartan Mask Replaceable Grip — Black Fiberglass-Reinforced Polymer for 5.56×45 M16 Lower Receiver Variants (Model FXMOJOPHAB / UPC 7290111583353)
Upgrade ergonomics, reload speed, and the look of your AR-platform rifle with the FAB Defense Mojo Magwell w/Spartan Mask Replaceable Grip (FXMOJOPHAB). Built from rugged fiberglass-reinforced polymer, this drop-in magwell blends fast, instinctive magazine catches with an aggressive, modern aesthetic — complete with a removable Spartan Mask grip panel for a custom appearance and enhanced hand purchase. Designed for 5.56×45 / .223 AR-style lowers (M16 family variants), the Mojo magwell streamlines reloads, protects the mag well from snags, and gives your rifle a distinctive tactical edge.
Why the FAB Defense Mojo Magwell matters
A well-designed magwell speeds reloads by funneling magazines into the magwell reliably under stress, while also stiffening the lower and improving overall feel. FAB Defense’s Mojo combines that practical benefit with a replaceable grip face (the Spartan Mask) so you can personalize tactile feedback and visual style without replacing the entire component. The fiberglass-reinforced polymer construction keeps weight low while delivering military-grade durability for range, duty, and field use.
Key Features & Benefits
Model / UPC: FXMOJOPHAB — 7290111583353
Platform: Fits 5.56×45 / .223 AR-15 / M16 lower receiver variants (verify lower compatibility before purchase)
Material: Fiberglass-reinforced polymer — lightweight, impact resistant, and corrosion proof
Replaceable Grip Face: Spartan Mask panel is removable and replaceable for customization or replacement in the field
Magwell Flare / Funnel: Contoured inlet funnels magazines smoothly for faster, more reliable reloads under stress
Improved Ergonomics: Lower hand purchase and positive control for faster transitions and better re-indexing after reloads
Tool-less Removal/Replacement: Designed for easy installation and removal without extensive gunsmithing on most lowers
Aggressive Texturing: Strategically placed texture reduces slip with gloved or wet hands while maintaining comfort for prolonged use
Low Profile Exterior: Maintains a sleek look and minimizes snag points compared to bulky aftermarket magwells
Durable Finish: Matte black polymer finish that resists scuffs, solvents, and range wear
Enhanced Lower Rigidity: Adds structural support around the magwell to reduce flex and rattle under use
Design Details & Engineering
Spartan Mask Insert: The replaceable insert serves both aesthetic and functional roles — it provides bite and reference for support-hand placement while giving your rifle a signature look. Replacement inserts (when available) and alternate styles/finish options let you tailor grip feel and appearance.
Tapered Mouth Geometry: Internally radiused edges guide magazines during rapid reloads, reducing fumbling and failure to seat.
Reinforced Mounting Bosses: Built to withstand repeated magazine strikes and aggressive manipulation without cracking or loosening.
Slim External Profile: Keeps your rifle compact and maneuverable while still providing a meaningful flare for practical reloading.
Compatibility & Fitment
Intended For: Standard mil-spec AR-15 / M16 lower receivers in 5.56×45/.223 family.
Verify Before Buying: Because lower receiver contours and proprietary billet designs vary, check your lower’s magwell geometry and manufacturer notes for compatibility. Some aftermarket lowers or proprietary lower designs may require minor fitting or not be compatible.
Works With: Most standard 5.56 magazines (PMAGs, USGI, etc.) when installed correctly. Test with your magazine brand/model to ensure smooth seating and retention.
Not Designed For: Non-AR-pattern firearms, proprietary non-standard lowers, or magazines outside of standard 5.56/.223 dimensions.
Installation (High-Level)
Safety First: Unload the rifle, remove magazine, and verify the chamber is empty.
Remove Existing Grip / Plate: If your lower requires removal of the trigger guard or grip plate, follow the lower manufacturer’s procedure. Many installations are drop-in with only a single screw or pin change.
Fit the Mojo Magwell: Slide the magwell into position, aligning mounting bosses with the lower receiver’s mating surfaces.
Secure Fasteners: Use supplied hardware or OEM screws to secure the magwell. Torque to the manufacturer’s recommendation (hand-tight plus slight snug is typically sufficient for polymer hardware).
Insert Spartan Mask Panel: Snap or screw the replaceable grip panel into place per instructions.
Function Check: Install an empty magazine, cycle a few inserts, and confirm secure seating, release, and no interference with the bolt catch or trigger housing. Re-check fasteners after your first range session.
If you are unsure of any step, have a qualified armorer or gunsmith perform the installation.
Use Cases & Who Should Buy It
Competition Shooters: Speed reloads and consistent indexing for improved stage times.
Tactical / Duty Operators: Faster malfeasance recovery and magazine changes under stress.
Hunting & Patrol: Durable, low-maintenance upgrade that stands up to field use.
Custom Builders & Enthusiasts: Adds distinctive looks and handling improvements to a custom AR build.
Anyone Seeking Ergonomic Upgrade: Improves magazine alignment and hand purchase without major alteration to rifle geometry.
Care & Maintenance
Cleaning: Wipe down with a damp cloth to remove dirt and debris. For heavy grime, light soap and water are safe; avoid prolonged exposure to harsh solvents.
Inspection: Periodically check mounting hardware and the replaceable insert for cracks or wear; replace the Spartan Mask panel if it becomes damaged.
Storage: Store the rifle in a dry environment. The fiberglass-reinforced polymer resists corrosion but benefits from routine firearm care.
Frequently Asked Questions (FAQ)
Q: Will this magwell fit my billet lower?
A: Many billet lowers use non-standard magwell contours. Verify your lower’s spec or consult the lower manufacturer. Some fitment may require minor trimming or not be compatible.
Q: Does the magwell change magazine retention or release?
A: Properly fitted, the magwell funnels magazines without altering the magazine catch geometry. Always test with your magazines to confirm smooth seating and retention.
Q: Are replacement Spartan Mask panels available?
A: FAB Defense offers replaceable panels or alternate inserts for several products — check FAB’s accessory catalog or authorized dealers for availability.
Q: Is this ambidextrous?
A: The magwell improves ergonomics for both right- and left-handed shooters, however the Spartan Mask face is a single orientation—left/right grip feel is similar for both hands.
Technical Specifications (At-a-Glance)
Manufacturer: FAB Defense
Product: Mojo Magwell w/Spartan Mask Replaceable Grip
Model: FXMOJOPHAB
UPC: 7290111583353
Material: Fiberglass-reinforced polymer (fiber glass nylon composite)
Color / Finish: Matte black polymer
Compatibility: 5.56×45 / .223 AR-15 / M16 lower receiver variants (verify fit)
Features: Flared magwell inlet, replaceable Spartan Mask grip panel, aggressive texture, low profile design
Weight: Lightweight (varies slightly by batch)
Installation: Drop-in / screw install on compatible lowers
SEO-Friendly Summary
The FAB Defense Mojo Magwell (FXMOJOPHAB) is a black, fiberglass-reinforced polymer magwell for 5.56×45 AR-15 / M16 lower receiver variants. Featuring a flared funnel mouth for faster reloads and a replaceable Spartan Mask grip panel, this Mojo magwell improves ergonomics, speeds magazine changes, and adds a tactical aesthetic while keeping weight to a minimum. Model FXMOJOPHAB / UPC 7290111583353.
Take control of your reloads and give your AR a performance and style upgrade with the FAB Defense Mojo Magwell w/Spartan Mask Replaceable Grip — engineered for faster magazine changes, better hand purchase, and long-lasting field durability.
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