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  3. AR15 9MM Conversion Mag (20) RD EXOMAG Mean Arms
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AR15 9MM Conversion Mag (20) RD EXOMAG Mean Arms

AR15 9MM Conversion Mag (20) RD EXOMAG Mean Arms

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Your Price: $25.21
AR15 9MM Conversion Mag (20) RD EXOMAG Mean Arms
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Part Number: MAEXOMAG20
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  • Description

MEAN ExoMag – 9mm Magazine for Standard AR-15 Lowers (20-Round)

The MEAN ExoMag is engineered to be a reliable, smooth-feeding 9mm magazine while maintaining the familiar STANAG outer profile. Pair it with the 9mm upper of your choice (Glock- or Colt-pattern 9mm BCG) to run 9mm on a standard AR-15 lower—no magwell adapter required. All ExoMag models include a last-round bolt hold-open, just as an AR-15 should.

Capacity: Standard 20 rounds (9×19mm)

Compatibility & Package Selection

  • Standard blowback 9mm bolts: Choose the Ejector version.
  • MEAN Bearing Delay Upper or CMMG Radial Delay systems: Choose the Ejectorless version.
  • Works with Glock or Colt variant 9mm BCGs when paired with the appropriate 9mm upper.

ExoMag Features

  • Quick caliber change from .223/5.56 to 9mm using your standard AR lower.
  • No magwell adapter or receiver modifications required.
  • Last-round bolt hold-open for proper AR-15 function.
  • STANAG magazine profile—same draw, same feel, same reload muscle memory.
  • Compatible with most STANAG accessories (pouches, racks, decals, caliber markers, etc.).
  • Feeds a wide range of 9mm ammunition, including hollow points.
  • Ships fully assembled—no tools required.

Specs

  • Platform: AR-15 standard 5.56 lower (no modifications)
  • Operation: Works with 9mm upper (Glock/Colt pattern BCG)
  • Bolt Hold-Open: Yes (last round)
  • Ejector: Built-in on “Ejector” model; omitted on “Ejectorless” model
  • Material: Specially formulated polymer
  • Overall Height: 3.66 in (approx.)
  • Warranty: MEAN Lifetime Warranty

Notes

  • Bearing Delay users: Select the Ejectorless option.
  • CMMG Radial Delay users: Select the Ejectorless option.

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