Breek Arms

(11 reviews) Write a Review

**This item does NOT thread directly onto your barrel, it is used in conjunction with one of our Outside Threaded Muzzle Devices.**

Breek's new slim-line Castle Blast Shield is a muzzle accessory designed to reduce the felt blast noise and concussion for the shooter and nearby operators while still focusing on keeping things compact and lightweight. The blast shield compresses tight to the back of the muzzle brake and directs the noise forward, downrange from the shooter. Anyone nearby on the range or in the field will appreciate the blast being re-directed away from them, improving their hearing and even reducing the burst of gas that can be felt from certain muzzle brake designs when a secondary operator is close.

With the Blast Shield installed it will reduce your muzzle brake's effectiveness. But if you are shooting alone or just don't care about the extra noise you are making, it can easily be threaded off and back on as desired. This allows you to pick the benefits you want in any circumstance, without requiring any tools to change anything out.

The 1.26" outside diameter design allows for the Blast Shield to fit inside most slim-line handguards. And coming in at only 2.15 inches long it adds negligible overall length to your rifle. The 6061 aluminum body and anodized finish of our blast device is made to last. And while it is strong, it is also extremely light weight coming in at a mere 1.6 ounces!

Key Features:

  • 1.26" outside diameter fits inside almost any handguard, even slim-line handguards
  • 2-1/8" length adds negligible overall length to most muzzle devices
  • 1.6 ounces - Incredibly light, especially important for a component that is out at the end of the barrel
  • 13/16 x 16 TPI threading - works with ALL of our Outside Threaded Muzzle Devices
  • Design re-directs noise and gasses away from the shooter 

Note: The Blast Shield does not protect your ears from the full noise of shooting - it is not a suppressor. Always wear ear protection when shooting!


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

11 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Nasty on May 20th 2024

    Absolutely love it!

  • 5
    Excellent Device

    Posted by Anthony on Sep 30th 2023

    So I too my new 7.5" upper to the range and quickly realized that the concussion to the left and right shooters was significant. I went over to Breek and looked for options. I bought the flash hider and the Blast Shield and all my concerns were quickly resolved. Fantastic upgrade and priced right. Install is easy and I am 100% satisfied with my purchase. Will be purchasing more in the near future.

  • 5
    Castle Blast Shield

    Posted by Larry Duckett on Jul 18th 2023

    The best Ive used so far

  • 5
    Blast shield

    Posted by James Heagy on Mar 9th 2023

    They look great and are inexpensive. I’ve purchased several and will use them again. Very fast shipping also. Thanks.

  • 5
    Blast shield

    Posted by Bruno on Mar 1st 2023

    The castle blast shield looks great, but the BLEM 45 Cal 5/8x24 Flash Hider Short Outside Thread doesn't fit in it

  • 5
    AWESOME Blast Shield!

    Posted by ReddMeister on Dec 7th 2022

    The can does prevent most of the noise from the muzzle…. And obviously since it’s made specifically for sound mitigation, it does add a bit on the recoil. Now if BA can figure out a way to lessen the recoil using the can… I’d buy one for each of my ARs!

  • 5
    Blast Shield

    Posted by Kenneth jackson on Mar 14th 2022

    Hands down best thread protector and sound forward product on the market for under 100 bucks. Super light, looks awesome, and works flawlessly. Looks B.A. on a short barrel upper with a slightly longer handguard , and with all the threaded muzzle devices Breeks offers. Best deals I've found anywhere. I'm a daily deal shopper ,especially for AR gear. If you're on the fence, better get it if it's in stock! Just sound advice.

  • 5

    Posted by Michael Tovar on Jan 18th 2022

    This is a great way to protect the usable threads on their muzzle devices. Plus it’s contour makes it look even more amazing.

  • 5
    Blast Shield

    Posted by Damian on Jan 7th 2022

    Great product and design. Similar in quality and function when compared to other high-end manufacturers but offered at a substantially lower price. Definitely my go-to blast shield from now on.

  • 5
    Blast shield

    Posted by Miguel Camacho on Dec 7th 2021

    One of the best looking blast shield on the market and affordable too.

  • 5
    Castle Blast Shield

    Posted by Gregory Johnson on Dec 6th 2021

    Simply the best combination of look, function, quality and price. I own several.

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