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Magpul PMAG 40 AR-15/M4 Gen M3 Magazine .223 Rem./5.56 NATO 40 Rounds Black
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$24.99
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SKU: WX2*0705588
Overview
Built for AR-15 and M4 rifles and pistols, this 40-round magazine is aimed at shooters who want a higher-capacity option for range use, training, or other applications where extended strings of fire matter. Its reinforced all-polymer construction, constant-curve body, and 4-way anti-tilt, self-lubricating follower are designed to support smooth feeding and straightforward handling. The modified dimensions are intended to broaden compatibility with non Colt-spec platforms, while the flared floor plate and slim profile help it fit double and triple pouches more easily. A dust cover is not included and is sold separately.
Why Hunters Choose the Magpul
Fits Ar-15
M4 rifles and pistols
Reinforced All-polymer
Construction for a durable magazine
Modified Dimensions
Non Colt-spec platforms
4-way Anti-tilt,
Self-lubricating polymer follower reduces friction
Constant-curve Body
Supports smooth feeding
Key Features
- Fits AR-15 and M4 rifles and pistols
- 40-round capacity for .223 Rem./5.56 NATO cartridges
- Reinforced all-polymer construction
- 4-way anti-tilt, self-lubricating polymer follower
- Constant-curve body supports smooth feeding
- Flared floor plate fits double and triple pouches
- Paint pen dot matrix panels for identification marking
Best Used For
- For AR-15 and M4 owners wanting a 40-round magazine for range sessions or training drills.
- For hunters using compatible rifles and pistols who want a higher-capacity magazine option.
- For users with non Colt-spec platforms needing broader magazine compatibility.
- For shooters who prefer easy identification marking and organized magazine management.
- For those packing magazines in double or triple pouches and wanting a slim fit.
Specifications
| Body Design | Constant-curve body |
|---|---|
| Bolt Catch Notch | Redesigned bolt catch notch |
| Caliber | .223 Rem./5.56 NATO |
| Capacity | 40 rounds |
| Construction | Reinforced all-polymer construction |
| Country Of Origin | USA |
| Dust Cover Included | No |
| Floor Plate | Flared floor plate |
| Follower | 4-way anti-tilt, self-lubricating polymer follower |
| Identification Marking | Paint pen dot matrix panels on the bottom of the body |
| Over Travel Stop | Over-travel insertion stop on the spine |
| Platform Compatibility | AR-15 and M4 rifles and pistols |
| Spring | Long-life stainless steel spring |
| Texture | Low-profile ribs and front and rear texture |
Pros
- Fits AR-15 and M4 rifles and pistols
- Reinforced all-polymer construction for a durable magazine body
- Modified dimensions allow wider compatibility with non Colt-spec platforms
- 4-way anti-tilt, self-lubricating polymer follower reduces friction
- Constant-curve body supports smooth feeding
- Flared floor plate and slim profile fit double and triple pouches
Considerations & Trade-offs
- 40-round capacity adds length and bulk compared with standard-capacity magazines, which can make carry and storage less convenient in some setups.
- The modified dimensions are intended for wider compatibility with non Colt-spec platforms, so fit should still be checked against the specific rifle or pistol being used.
- Dust cover is not included and is sold separately.
- The all-polymer construction and flared floor plate may be a trade-off for users who prefer a different magazine feel or profile.
Suggested Comparisons
- AR-15/M4 30-round magazines
- Higher-capacity AR-15 magazines
- Standard-capacity rifle magazines
- Magazine pouches for double or triple stacks
Suggested Accessories
- Magazine pouch
- Dust cover
- Rifle cleaning kit
- Ammo storage box
Frequently Asked Questions
What rifles or pistols does this PMAG 40 fit?
According to the product data, it fits AR-15 and M4 rifles and pistols.
Is this magazine compatible with non Colt-spec platforms?
The listing says the modified dimensions allow for wider compatibility with non Colt-spec platforms, but it does not name specific models.
Does it include a dust cover?
No. The product notes that the dust cover is not included and is sold separately.
What features are listed for feeding and handling?
The listed features include a 4-way anti-tilt, self-lubricating polymer follower, a constant-curve body for smooth feeding, low-profile ribs, front and rear texture for handling, and a flared floor plate.
Can the magazine be marked for identification?
Yes. The body includes paint pen dot matrix panels on the bottom for identification marking.