The Magtech Subsonic .300 AAC Blackout 200-Grain Flat Full Metal Jacket Factory Brass 50-round box is specialized centerfire rifle ammunition engineered explicitly for suppressed AR-15 platforms, short-barreled rifles (SBRs), bolt-action carbines, and high-volume tactical training. Standard supersonic .300 Blackout loads create a loud downrange crack that reduces the effectiveness of sound suppressors, while boutique subsonic hunting ammunition carries high per-round costs that limit practice volume. Magtech resolves these acoustic and training cost limitations by producing all cases, primers, and propellants completely in-house, driving a heavy 200-grain flat FMJ projectile at a subsonic 1,017 FPS and 459 ft-lbs of muzzle energy for whisper-quiet performance.
The primary performance advantage centers on the heavy 200-grain Flat Full Metal Jacket bullet geometry, which boasts an impressive 0.56 ballistic coefficient. Operating comfortably beneath the sound barrier (~1,125 FPS), the projectile retains downrange velocity and kinetic momentum out to 300 yards without producing a sonic boom. Built for duty storage and tactical range conditions, Magtech applies specialized sealant to both the primer pocket and case mouth, creating a moisture-resistant barrier that protects internal propellants against humidity and environmental contamination.
Produced by Magtech Ammunition—a primary commercial brand under the vertically integrated CBC Global Ammunition defense group—these cartridges are assembled in factory-fresh, precision-drawn reloadable brass cases. Charged with clean-burning propellants and sensitive, non-corrosive Boxer primers, Magtech Subsonic reduces carbon accumulation inside suppressor baffles and firearm gas blocks, leaving target shooters with high-grade brass casings for custom reloading.
Key Benefits
- Subsonic 1,017 FPS Velocity: Completely eliminates the downrange sonic crack for maximum suppressor noise reduction.
- High 0.56 Ballistic Coefficient: Heavy 200-grain flat FMJ profile preserves downrange kinetic energy and flight stability.
- Environmental Case & Primer Sealant: Moisture-resistant sealant on neck and primer pocket protects against humidity during storage.
- In-House Vertically Integrated Quality: Manufactured entirely by CBC Global for consistent lot-to-lot velocity and reliable ignition.
Technical Specification
- Caliber: .300 AAC Blackout (.300 BLK / 7.62x35mm)
- Bullet Type/Weight: Flat Full Metal Jacket Subsonic (FMJ) | 200 Grain
- Ballistics: 1,017 FPS Muzzle Velocity (Subsonic) | 459 ft-lbs Muzzle Energy | 0.56 BC
- Casing/Primer: Sealed Reloadable Factory Brass | Sealed Non-Corrosive Boxer Primer
- Logistics: 50 Rounds Per Box | Magtech Tactical/Training Series
- Dimensions: Standard .300 BLK SAAMI Geometry | Manufacturer: Magtech / CBC Global
- Application: Suppressed Target Training, Tactical Carbine Drills, Range Plinking, Ammo Stockpiling
- Standards: SAAMI Compliant | ISO-Grade Military & Commercial Production
When running suppressed tactical carbine drills or stocking up for quiet range practice, having clean-burning, sealed subsonic ammunition engineered for total noise reduction is essential. Equip your .300 Blackout platform with quiet, high-volume efficiency using Magtech Subsonic 200gr FMJ ammunition—backed by trusted service and available now at SMKW.
