Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(53)
List: $12.95 $11.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(34)
List: $14.95 $13.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(48)
List: $17.95 $16.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(24)
List: $14.95 $14.19
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(34)
List: $14.95 $13.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(48)
List: $17.95 $16.95 Save Up to $1.00
Best Rated Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
(11)
List: $26.99 $17.99 Save Up to 33%
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(12)
List: $15.95 $14.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(12)
List: $22.95 $20.45 Save Up to 11%
Best Rated PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
(112)
List: $14.99 $12.49 Save Up to 17%
Customer Reviews
Helpful Positive Review
Always work by Karl L, Verified Owner, July 13, 2025
Bought these 20 round mags for a couple reasons. First, when shooting bench rest, the 30 round mags hit the bench. The shorter 20 round mag allows for plenty of clearance from the bench or, when shooting prone. Second, 20 round mags allow me to NOT g...
Read More...
1/1 found this helpful
Most Recent Reviews
solid product by brib, Verified Owner, April 12, 2026
Happy with the quality, solid product. Will be buying more in the future. Highly recommend
Most Recent Reviews
magpul is great by Bear, Verified Owner, March 24, 2026
Only buy magpul this is a great product.i really like the gen3 also buy some Ranger plates great combo
Most Recent Reviews
quality as always by mark, Verified Owner, March 14, 2026
Needed a 20 round for a daniel defense sniper rifle as the 30 is to long with the bipod.
Most Recent Reviews
Great for sighting in by BIGJMO, Verified Owner, February 23, 2026
Being shorter than the 30 rounder, this one gets along better with some of the rests I’ve used at the range. It also lets your barrel cool a little more when shooting prairie dogs than the 30 rounder. Typical high Magpul quality.
Most Recent Reviews
Easy Mag for use at gun range by IrishTom1969, Verified Owner, February 12, 2026
Best mag size to use at range. Just enough rounds to help with sighting in your AR. HIGHLY RECOMMEND!
Read All 24 Reviews
Show In Stock Only
4 Models Available
Color
All
Caliber
All
Quantity
All
Search

Certain firearm magazines and extensions are subject to maximum capacity restrictions based on state and local laws. Currently, we are unable to sell these products to some locations. For a complete list of these restrictions, please visit our policy page.

By continuing with your purchase, you agree to adhere to all applicable laws and regulations.  

Product Info for Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 20 Round Rifle Magazine

the PMAG 20 AR/M4 GEN M3 is a polymer magazine for AR15/M4 compatible weapons. Similar to the MOE PMAG, the GEN M3 features a long-life USGI-spec stainless steel spring for commonality, a four-way anti-tilt follower, constant-curve internal geometry for reliable feeding, and simple tool-less disassembly for easy cleaning. It also features a redesigned bolt catch notch in the rear of the magazine that provides increased bolt catch clearance, while an over-travel stop on the spine helps ensure the magazine will not over-insert on compatible weapons. Low profile ribs and new, aggressive front and rear texture give positive control of the GEN M3 in all environments, and a paint pen dot matrix has been added to the bottom panel of the body to allow easy marking for identification. The new, easy to disassemble flared floorplate aids extraction and handling of the magazine while providing improved drop protection, but is slightly slimmer than before for better compatibility with tight double and triple magazine pouches.image

Specifications for Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 20 Round Rifle Magazine:

Manufacturer: Magpul Industries
Magazine Body Material: Polymer
Fabric/Material: Polymer
Magazine Capacity: 20 Round
Gun Make: AR Platform
Gun Model: AR-15
Condition: New

Features of Magpul Industries PMAG 20 Gen M3, AR-15, .223 Remington, 20 Round Rifle Magazine

  • Next-generation impact and crush resistant polymer construction
  • The anti-tilt, self-lubricating follower ensures a smooth feed and magazine reliability
  • Modified dimensions allow for wider compatibility with non Colt-spec platforms
  • Utilize the paint pen dot matrix to easily identify magazines with different loadouts
  • Flared floorplate aids magazine handling and disassembly, and is slim enough for use with many double and triple pouches
  • Compact 20 round magazine accomodates firing from a prone position
  • Next-generation impact and crush resistant polymer construction
  • Its ribbed gripping surface and aggressive front and rear texture provide positive magazine handling
  • Constant-curve internal geometry, over-travel insertion stop on the spine, and a long-life stainless steel spring ensure smooth feeding

Package Contents:

  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 20 Round Rifle Magazine

Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 20 Round Rifle Magazine Orderable Models

List of Orderable Models

  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD , MPN: MAG560-BLK , UPC: 873750007915 , Code: 55-RM-HDQ-MAG560-BLK-20RD
  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 3 Pack , MPN: MAG560BLK-KIT1 , Code: 55-RM-HDQ-MAG560-BLK-KIT1-20RD
  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 10 Pack , MPN: MAG560-BLK-KIT2 , Code: 55-RM-HDQ-MAG560-BLK-KIT2-20RD
  • Magpul Industries PMAG AR/M4 GEN M3 5.56 20 Rounds Rife Magazine, OD Green, MAG560ODG , MPN: MAG560-ODG , UPC: 873750007946 , Code: 55-RM-HDQ-MAG560-ODG-20RD

Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 20 Round Rifle Magazine Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD , MPN: MAG560BLK-EDEMO , Code: 55-RM-HDQ-MAG560BLK-20RD-EDEMO-OB-B
  • USED, Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD , MPN: MAG560BLK-EDEMO , Code: 55-RM-HDQ-MAG560BLK-20RD-EDEMO-OT-A
  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Olive Drab Green, 3 Pack , MPN: MAG560-ODG-KIT1 , Code: 55-RM-HDQ-MAG560-ODG-KIT1-20RD
  • Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Olive Drab Green, 10 Pack , MPN: MAG560-ODG-KIT2 , Code: 55-RM-HDQ-MAG560-ODG-KIT2-20RD
Compare (0)