3FO Flash Hider V2 Outside Threaded - .223/5.56, 9mm, .30 Caliber

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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. 

  • Internal Threads Disrupt Gas Expansion Resulting in Less Flash
  • Design: 3FO - 3 Prong Outside Threaded Flash Hider
  • Outside Thread: 13/16 x 16 TPI
  • Material: 4140 Steel Heat Treated & Nitrided
  • Cone Shape Lockup Provides a Tighter & More Concentric Fit
  • Comes with 1 Crush Washer
  • Overall length: 2.36 Inches
  • Weight: 2.6 oz (223/556) 2.3 oz (30 cal)
  • Made in America

Caliber & Thread Options:

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

See all of our Outside Threaded Muzzle Device designs here!

CFO : Cage Style Flash Hider Outside Threaded

3FO v2 : 3 Prong Flash Hider Outside Threaded

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

1BO-S : Single Port SHORT Muzzle Brake Outside Threaded (coming soon)

2BO : Two Port Muzzle Brake Outside Threaded (coming soon)

Castle Blast Shield Outside Threaded Forward Concussion Device

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  • 3
    3FO Flash Hider V2 Outside Threaded - .223/5.56, 9mm, .30 Caliber

    Posted by M Webb Rooney on Jan 11th 2023

    I have bought several of these in .223. So far I have some that work perfectly fitting an armorers wrench, some that are slightly too large for the wrench to fit and some that are much larger than the wrench. I have no idea why there is that much variance in size.

  • 5

    Posted by craig anderson on Jan 3rd 2023

    At this point it seems to be pretty comparable to the Surefire

  • 5
    Inexpensive but effective.

    Posted by Jon Anthony Beck on Dec 28th 2022

    Looks awesome, finish is great, everything went together fine and reduces flash as advertised. Can’t be mad.