3FO-S Flash Hider Short Outside Threaded - .223/5.56, 9mm, & .30 Cal

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The 3FO-S Flash Hider is machined out of heat treated 4140 then nitrided offering exceptional strength and reliability. The primary function of the 3FO-S diminishes muzzle flash by dispersing and redirecting the escaping gases generated by the fired round, thus minimizing the signature flash produced at the muzzle maintaining your tactical advantage in critical situations as well as keeping your rifle footprint as small as possible.

The 3FO-S has internal threads, a significant design advantage offering even more flash suppression over standard flash hiders. The reduced flash not only helps maintain a clear sight picture but also reduces the chances of the shooter being temporarily blinded in low-light conditions, ensuring optimal visibility and target acquisition. It features a sleek, short profile that integrates seamlessly with your system, maintaining a clean and streamlined appearance.

  • Short profile works great for Pistol Caliber Carbines 
  • Internal Threads Disrupt Gas Expansion Resulting in Less Flash
  • Design: 3FO-S: 3 Prong Outside Threaded Short Flash Hider
  • Outside Thread: 13/16 x 16 TPI
  • Material: 4140 Steel Nitrided
  • Cone Shape Lockup Provides a Tighter & More Concentric Fit
  • Comes with 1 Crush Washer
  • Overall length: 1.58 Inches
  • Weight: 2.2 oz (223) 1.9 oz (9mm)
  • Made in America

Caliber & Thread Options:

  • Cal: 223/556; Thread: 1/2x28
  • Cal: .30; Thread: 5/8x24
  • Cal: 9mm, Thread: 5/8x24
  • Cal: 9mm; Thread: 1/2x28
  • Cal: 9mm; Thread: 1/2x36

Breek Arms’ lineup of Outside Threaded Muzzle Devices is an affordable upgrade that gives you the option to run a flash hider or muzzle brake while utilizing our Breek Arms Castle Blast Shield as a forward blast diverter or concussion device. Simply slide the Blast Shield over the outside of the muzzle device and turn the blast shield on. This gives the shooter a more pleasant experience when firing especially for shorter platforms that tend to have an overbearing concussion. Added durability due to an updated heat treating process that increases reliability for higher muzzle pressures. Installation of all Breek Arms muzzle devices are very straightforward and require basic hand tools. 

See all of our Outside Threaded Muzzle Device designs here!

BFO : Cage Style Flash Hider Outside Threaded 

3FO v2 : 3 Prong Flash Hider Outside Threaded

3FO-S : 3 Prong SHORT Flash Hider Outside Threaded

2BO-S : Single Port SHORT Muzzle Brake Outside Threaded

2BO : Two Port Muzzle Brake Outside Threaded

Castle Blast Shield Outside Threaded Forward Concussion Device

6 Reviews Hide Reviews Show Reviews

  • 5
    Muzzle device

    Posted by Larry Duckett on May 31st 2023

    The best I have used yet! Breeharms is a very good company they shipped very fast and most of all there prices are reasonable!!!!

  • 5
    Excellent as always

    Posted by Thomas on May 10th 2023

    Bad ass as usual attention to detail to the nth..

  • 5
    Short Flash hider 9mm

    Posted by Pat Huffman on Mar 20th 2023

    Used on a 16" PCC build to make an already quiet rig even quieter. Works great.

  • 5

    Posted by Serge on Sep 13th 2022

    Quality wise this thing looks good, but the main reason I bought it was because of the blast shield attachment option. The look of the two together is awesome. Can't speak for functionality since I haven't been to the range yet, but I don't forsee any issues.

  • 5
    Amazing looks

    Posted by Michael Tovar on Jan 18th 2022

    It’s small and does the job while keeping the rifle looking badass. Definitely would recommend if someone is looking to shorten their muzzle break. It pares nicely with their blast shroud.

  • 5
    Flash hider

    Posted by Miguel Camacho on Dec 7th 2021

    Very easy to install and looks great