J
jebstewart11great upgrade
Reviewed on March 4, 2026Verified with Build
great pairing for my build
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Fortis Control 300 Blk Muzzle Brake 5/8x24 - Black
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Fortis Manufacturing
Overview
The Fortis Control 300 Blackout Muzzle Brake is designed specifically for the 7.62x39mm caliber, providing effective recoil reduction and muzzle rise management for enhanced shooting control. With a 5/8x24 thread pitch, it easily fits on compatible barrels, while the nitride finish adds durability and corrosion resistance to the steel construction. This muzzle device is commonly found in mid-length gas system builds, particularly those chambered in 300 Blackout, making it a practical choice for builders looking to optimize performance in that caliber.
Specifications
MPN300BLK-MB
Caliber300 Blackout
FinishNitride
TypeMuzzle Brake
MaterialSteel
Thread Pitch5/8x24
ColorBlack
Muzzle Device TypeMuzzle Brake
Frequently Built With
Based on build data
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Strike Industries Collar Adjustable Gas Block
Spikes Tactical Made in USA Ejection Port Door for AR-15 Style Rifle - SED7002
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
86.8%
AR-1586.8%
AR-1013.2%
CaliberBased on real build data showing which calibers builders choose alongside this product.
53.3%
5.56 NATO53.3%
.223 Wylde24.4%
.308 Win8.9%
300 Blackout6.7%
7.62x39mm2.2%
Other4.4%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
52.9%
Mid-Length52.9%
Rifle20.6%
Carbine14.7%
Pistol11.8%
| Product | Category | Times Built Together |
|---|---|---|
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | 24 | |
| Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers | 18 | |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | 17 | |
| Strike Industries Collar Adjustable Gas Block | 15 | |
| Spikes Tactical Made in USA Ejection Port Door for AR-15 Style Rifle - SED7002 | 15 | |
| Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4 | 14 |
| Platform | Percentage |
|---|---|
| AR-15 | 86.8% |
| AR-10 | 13.2% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 53.3% |
| .223 Wylde | 24.4% |
| .308 Win | 8.9% |
| 300 Blackout | 6.7% |
| 7.62x39mm | 2.2% |
| .450 Bushmaster | 2.2% |
| 6mm ARC | 2.2% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 52.9% |
| Rifle | 20.6% |
| Carbine | 14.7% |
| Pistol | 11.8% |
Builds Featuring This Part
See all 36 →Builds in the community that include the Fortis Control 300 Blk Muzzle Brake 5/8x24 - Black
| Build | Parts | Total |
|---|---|---|
 | 23 | $2350.21 |
 | 28 | $3539.69 |
 | 18 | $1375.96 |
 | 11 | $1962.35 |
 | 28 | $1903.96 |
 | 12 | $2050.14 |
 | 22 | $1654.18 |
 | 13 | $2359.84 |
 | 12 | $1900.79 |
 | 25 | $2494.60 |
| 29 | $3517.40 |
 | 19 | $3392.95 |
Customer reviews
5.0out of 5
3 global ratings
Top reviews
J
Jordanii36Fortis 300 BLK timing washer
Reviewed on February 8, 2026Verified with Build
Fortis Control 300 BLK muzzle brake in 5/8x24 stays tight with the timing washers - no shifting after a few hundred rounds. No first round pop in low light from the muzzle blast. Effective at reducing muzzle climb on 300 BLK.
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D
dusters16_recceFortis 300 BLK brake
Reviewed on February 1, 2026Verified with Build
Fortis Control brake for 300 BLK in 5/8x24 thread reduces muzzle rise significantly on a 9 inch barrel. Side ports vent away from the shooter. Black phosphate matches the barrel finish. Crush washer timed it to 12 oclock easily. Solid brake for an SBR.
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