PMAG® 20 AR 300 B GEN M3®, 300 BLK

MSRP: $15.95
You save $1.00

$14.95

Order by 2PM CST for Same Day Shipping*
Shipping As Low As $1.99
100% Live Inventory, No Back Orders

(20 customer reviews)

31 in stock

Purchase this product now and earn 15 Points!

PRODUCT DETAILS

The PMAG 20 AR 300 B GEN M3 is a purpose-built magazine for rifles chambered in .300 Blackout® (300 BLK). Similar in every way to our PMAG 30 AR 300 B, the PMAG 20 is more compact for increased maneuverability and creates a more concealable package for use in small format firearms.

Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting that round’s ultimate performance and compatibility. One of the key features of 300 BLK in the past has been its compatibility with 5.56x45mm magazines. However, even with moderate success with that particular magazine, it is a compromise to do so, with reliability and safety both being at risk.

In addition to the performance gained by a dedicated mag, the PMAG 20 AR 300 B also offers a safer way to feed your 300 BLK rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 BLK round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 20 AR 300 B’s distinct ribbed design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues.

Along with optimized 300 BLK performance, the PMAG 20 incorporates all of our GEN M3 features, including our next-generation impact and crush resistant polymer, aggressive front and rear texture, an easily removable slim floor plate, a paint pen dot matrix for marking and identification, and a dust/impact cover.

Made in the USA.

Compact Magpul PMAG 20 AR 300 B GEN M3 in AR15 magwell showing paint pen dot matrix and unique ribbing pattern

PURPOSE-BUILT MAGAZINE ONLY FOR 300 BLK

Dedicated, reliable magazine for rifles chambered in 300 BLK that supports the differing geometries found in that caliber

20-round body is more compact for increased maneuverability, creating a more concealable package for use in small format firearms

DESIGNED WITH VISUAL & TACTILE DIFFERENCES

Distinct rib design and texture provide visual and tactile differentiation from other PMAGs to mitigate dangerous cross-loading issues

Magpul PMAG 20 AR 300 B GEN M3 with distinct rib design and texture provide to differentiation from other PMAGs
Bottom of Magpul PMAG 20 AR 300 B GEN M3 with slim line floorplate and other standard GEN M3 features

INCORPORATES THE SAME FEATURES AND PERFORMANCE OF THE GEN M3 LINE

Next-generation impact and crush-resistant polymer, aggressive front and rear texture, easily removable slim floor plate, a paint pen dot matrix and an impact/dust cover

RESOURCES

ECHNICAL SPECIFICATIONS

More Information
Caliber 300 BLK
Platform AR15, M4, M16
Capacity 20 rds
Compatibility Wide compatibility with most ‘STANAG 4179’ platforms such as the AR15/M4, FN SCAR, IWI Tavor, and others

Additional information

Weight 3.2099305402425 oz
Dimensions 6 × 3 × 1 in

20 reviews for PMAG® 20 AR 300 B GEN M3®, 300 BLK

  1. LedRobster (verified owner)

    Solid dedicated 300 blackout magazine that doesn’t break the bank.

  2. ramsdell.geron (verified owner)

    Best mag for 300 Blackout! All my 5.56 mag cause jams in my 300 BO, they aren’t so compatible as most say, but this one work for it, and works for my .50 Beowulf rounds! Buy a few today!

  3. double j (verified owner)

    Reliable. Enough said.

  4. trevs99teg (verified owner)

    Decided i needed a dedicated 300 blk magazine and big tex was my first choice

  5. Benjamin Rosel (verified owner)

    Just got into 300blkout, I did not know I needed separate mags. Glad you guys had some.

Only logged in customers who have purchased this product may leave a review.