Details
MEAN Arms ExoMag Ejector AR-15 9MM 40 Round Magazine with Nitride Bolt Carrier Group
The MEAN Arms ExoMag Ejector is a 40 round magazine designed to work with standard AR-15 lower receivers without requiring a magwell adapter. The magazine body and follower are made from lightweight polymer and feature a built in ejector for reliable performance. This system features last round bolt hold open functionality and accommodates all 9MM Luger ammunition types, including hollow points. The kit includes a 9MM nitride bolt carrier group made from 8620 alloy steel with full auto compatibility. This combination provides everything needed to convert a standard AR-15 lower to 9MM operation without additional modifications or adapters.
Key Features
- 40 round capacity for 9MM Luger cartridges, including hollow points
- Lightweight polymer body and follower with built in ejector
- Last round bolt hold open functionality
- No magwell adapter required for standard AR-15 lowers
- 9MM nitride bolt carrier group made from 8620 alloy steel with full auto compatibility
- Nitride finish for corrosion resistance
Perfect For
- Shooters looking to convert a standard AR-15 lower to 9MM without modifications
- Those wanting an extended capacity magazine system with complete BCG package
- Builders seeking a magazine system that works without magwell adapters
- Anyone prioritizing simplicity and versatility in 9MM pistol caliber conversions
ExoMag Design and STANAG Compatibility
The ExoMag Ejector is engineered to work with standard AR-15 lower receivers. The magazine inserts directly into a standard AR-15 magazine well just like a 5.56 magazine. The built in ejector eliminates the need for a dedicated 9MM ejector in the lower receiver. The last round bolt hold open functionality works with the standard AR-15 bolt catch, so the bolt locks back after the last round is fired. The lightweight polymer construction reduces overall weight while ensuring durability for demanding conditions.
Extended Capacity and Ammunition Compatibility
The 40 round capacity provides extended shooting time between reloads and is well suited for competitive shooting, training, or extended range sessions. The magazine accommodates all 9MM Luger ammunition types, including hollow points, which can sometimes present feeding challenges in other magazine designs. The polymer follower moves smoothly through the magazine body for reliable feeding across different ammunition weights and profiles.
9MM Nitride Bolt Carrier Group
The included 9MM bolt carrier group is made from 8620 alloy steel and finished with a nitride coating. The nitride finish adds surface hardness and corrosion resistance while reducing friction for smoother cycling and easier cleanup. This BCG uses a blowback system rather than a gas impingement system and is full auto compatible for those with the appropriate licensing. The BCG is designed specifically for 9MM Luger cartridges and works with the ExoMag system for solid performance.
Simple Conversion Without Modifications
This ExoMag and BCG combination allows you to convert a standard AR-15 lower to 9MM operation without requiring a magwell adapter, dedicated 9MM lower, or modifications to your existing lower receiver. Simply install the 9MM BCG in a compatible 9MM upper, insert the ExoMag into the standard magazine well, and the system functions like a dedicated AR-9 setup. This approach gives you caliber swapping flexibility without needing separate lower receivers for different calibers.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Verify compatibility with your upper receiver and other components before assembly. This system requires a 9MM upper assembly designed for blowback operation. The ExoMag works with standard AR-15 lower receivers.
