The Ammo Inc STELTH .300 AAC Blackout 220-grain Total Metal Case (TMC) Subsonic Brass 200-round bulk box is a specialty centerfire rifle cartridge engineered specifically for suppressed shooting applications where sound signature reduction, low backpressure, and reliable semi-automatic cycling are critical. A common friction point when shooting subsonic .300 BLK ammunition through suppressed rifles is erratic cycling, unburnt powder residue, and heavy lead fouling inside suppressor baffles caused by standard under-loaded powders. Ammo Inc resolves these suppressor-specific performance issues by pairing a purpose-blended powder geometry with a fully encapsulated TMC projectile to deliver consistent dwell pressure and extreme action cleanliness.
The core technical advantage relies on the total encapsulation of the 220-grain lead core. Unlike traditional full metal jacket bullets that leave exposed lead at the base, the Total Metal Case (TMC) design completely seals the lead core, eliminating hot-gas lead vaporization upon ignition and drastically reducing toxic lead buildup in firearm bores and suppressor baffles. Charged with proprietary Hyperclean technology, the propellant burns rapidly and completely within short barrels, preventing unburnt powder flakes from clogging gas blocks or blowing back into the shooter's face during high-volume strings of fire.
Exiting the muzzle at 1,014 FPS, this heavy 220-grain projectile remains safely below the speed of sound, eliminating the loud supersonic ballistic crack while preserving sufficient momentum and port pressure to cycle direct-impingement and piston-driven AR-15 platforms cleanly. Assembled in precision-drawn, reloadable virgin brass cases fitted with non-corrosive Boxer primers, it ensures uniform chamber seating, reliable cycling, and smooth extraction during high-volume tactical drills, range training, and suppressed shooting sessions.
Key Benefits
- Complete Subsonic Sound Suppression: Exits below the sound barrier at 1,014 FPS to eliminate the ballistic crack in suppressed rifles.
- Encapsulated TMC Bullet Construction: Encloses the lead base to stop hot-gas lead vaporization and keep suppressor baffles clean.
- Hyperclean Propellant Blend: Formulated for short barrels to cut carbon fouling and prevent gas block contamination.
- Reliable Semi-Automatic Cycling: Engineered to deliver consistent gas port pressure for smooth function in direct-impingement and piston platforms.
Technical Specification
- Ballistics: .300 AAC Blackout (.300 BLK) | 1,014 FPS Muzzle Velocity | Subsonic Velocity Profile
- Projectile: 220 Grain | Total Metal Case (TMC) | Fully Encapsulated Lead Core | Smooth Bearing Surface
- Case/Primer: Precision-Drawn Virgin Reloadable Brass Case | Non-Corrosive Boxer Primed
- Logistics: 200 Rounds Per Bulk Box | Ammo Inc STELTH Series
- Dimensions: Standard .300 BLK Geometry | Short-Barreled Rifle (SBR) & AR-15 Platform Configuration | SKU: 300B220TMC-STL-A200
- Application: Suppressed Target Shooting, High-Volume Range Practice, Tactical Drills, and Low-Signature Training
- Standards: SAAMI Compliant | Ammo Inc Factory Quality Control Benchmarks
SMKW sources ammunition that meets real-world performance standards for suppressed systems, and this STELTH .300 BLK load is built for shooters who need consistent cycling, reduced fouling, and controlled subsonic performance—secure your bulk supply from a proven retailer.
