J
jebstewart11great upgrade
Reviewed on March 4, 2026Verified with Build
great pairing for my build
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Fortis Control 300 Black 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
August 2026 on GunPartPicker
Fortis Control 300 Black Muzzle Brake 5/8x24 - Black was the second most added muzzle device on GunPartPicker in August 2026, behind the LANTAC Dragon SilencerCo Asr Muzzle Brake 5.56 - 1/2x28, with about 6% of all muzzle devices added to builds. Up from #4 in July. Builds with this muzzle device are split between 5.56 NATO (55%) and .223 Wylde (22%), split between mid-length (50%) and rifle-length (19%) gas systems, and mostly AR-15 (88%, then AR-10 12%).
It was in stock most days in August 2026, and today all 6 retailers we track have it in stock. It dipped to $64.19 at Optics Planet for a stretch in August 2026, under its usual $66.45, so sales do come around. Buying today, the lowest price is $65.99 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
Not sure which muzzle device to pick?
We ranked every muzzle device by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Muzzle Device Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 116 builds that include this one
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Charging Handle$155in 23 builds
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Upper Receiver$129 · out of stockin 27 builds
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
Bolt Carrier Group$149 · out of stockin 20 builds
Wilson Combat AR-15 Lo-Profile Gas Block .750" Black
Gas Block$33in 53 builds
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
Gas Tube$14in 42 builds
Rosco Manufacturing Bloodline 5.56 AR-15 Barrel M4 Carbine - 14.5"
Barrel$148in 18 builds
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.
87.8%
AR-1587.8%
AR-1012.2%
CaliberBased on real build data showing which calibers builders choose alongside this product.
55.1%
5.56 NATO55.1%
.223 Wylde22.4%
.308 Win8.2%
300 Blackout8.2%
7.62x39mm2%
Other4%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
50%
Mid-Length50%
Rifle19.4%
Carbine16.7%
Pistol13.9%
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 | $2433.53 |
 | 28 | $3622.54 |
 | 18 | $1381.10 |
 | 11 | $2192.56 |
 | 28 | $1935.08 |
 | 12 | $2333.93 |
 | 22 | $1693.17 |
 | 13 | $2580.64 |
 | 12 | $1908.77 |
 | 25 | $2604.64 |
| 29 | $3860.68 |
 | 19 | $3358.20 |
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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