In StockSave 11%
Magpul PMAG 30 Rnd Mag AR 300 B GEN M3 .300 Blackout - MAG800-BLK
Sold byPalmetto State Armory•Posted May 18, 2026
Compare prices for Magpul PMAG M3 300 B AR-15 Magazine 300 Blackout 30-Round Polymer Black$15.99
$17.99
You save $2.00 (11% off)
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Deal Summary
- Currently in stock.
- Caliber: 300blk
- Category: parts
Price History
Deal Details
The PMAG 30 AR 300 B Gen M3 is a purpose-designed magazine for rifles chambered in 300 Blackout. 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 5.56x45 mm 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 dedicat
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