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Magpul PMAG M3 300 BLK 30RD - Black

Magpul PMAG M3 300 BLK 30RD - Black

Magpul · Magazines

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Best price

$13.99at Kentucky Gun Co

In stock checked Nov 10, 2026

Buy at Kentucky Gun Co

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Where to buy

StorePriceAvailabilityBuyAdd to build
Kentucky Gun Co Best price $13.99checked Nov 10, 2026 In stock Buy at Kentucky Gun Co
Sportsman's Guide $19.99checked Nov 10, 2026 In stock Buy at Sportsman's Guide
AR15Discounts $12.95Salechecked Nov 10, 2026 Check store Buy at AR15Discounts
Dirty Bird $15.15checked Nov 10, 2026 Check store Buy at Dirty Bird
Guns.com $16.10checked Nov 10, 2026 Check store Buy at Guns.com

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $13.99 at Kentucky Gun Co. Dashed line = out of stock. Tracking since Oct 28, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$12.95$12.95$12.95
Dirty Bird$15.15$15.15$15.15
Guns.com$16.10$16.10$16.10
Kentucky Gun Co$13.99$13.99$13.99
Sportsman's Guide$19.99$19.99$19.99

Since Oct 28, 2026.

About this part

The Magpul PMAG M3 300 BLK 30RD - Black is a 300 Blackout magazine from Magpul. It's sold by 5 stores (2 in stock), from $12.95 to $19.99. The lowest in-stock price in the last 30 days was $13.99 at Kentucky Gun Co.

Fits and works with

Caliber
300 Blackout · Shop matching ammo

Specifications

Manufacturer
Magpul
Color
Black
Platform
AR-15
Caliber
300 Blackout

From the manufacturer

Product Details The PMAG(R) 30 AR 300 B GEN M3(TM) is a purpose-designed magazine for rifles chambered in 300 Blackout(R). Since its inception, 300 Blackout shooters have had to use a magazine designed for another cartridge, limiting its ultimate performance and compatibility. One of the nice features of 300 Blackout is the compatibility with 5.56x45mm parts, but with the magazine it is a compromise to do so. Due to the wide variety of projectile weights and profiles potentially decreasing overall reliability, a dedicated 300 Blackout magazine was a logical step for the PMAG line. In addition to the performance gained by a dedicated mag, the PMAG 30 AR 300 B also offers a safer way to feed your 300 Blackout rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 Blackout round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 30 AR 300 B's distinct rib 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 Blackout performance, the PMAG 30 AR 300 B brings along all of the GEN M3 features such as 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. * The PMAG 30 AR 300 B's distinct rib design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG * Dedicated, purpose-designed magazine for rifles chambered in 300 Blackout * Optimized internal geometry accommodates the wide variety of bullet profiles used in 300 Blackout cartridges * Carries forward the physical & performance features of the rest of the GEN M3 line

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$13.99 at Kentucky Gun Co
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