Image unavailable
Plan B Sentinel 5.56 Nato/.223 Rem Caged Flash Hider - Plan B Sentinel 5.56 Nato Caged Flash Hider 1/2x28''''
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$59.95
View on Brownells
You'll be taken to Brownells to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: 430115545
Overview
Designed for 5.56 NATO/.223 Rem rifles, this caged flash hider is aimed at shooters who want a compact, shrouded muzzle device for reduced flash and less snagging on gear. It is built for Plan B mounts and fast attachment to Plan B suppressor setups, making it a practical choice for pin-and-weld builds and 14.5-inch barrels intended to meet the 16-inch federal minimum length requirement. The closed-tine, fully shrouded layout also supports a cleaner profile for use around night vision equipment. With 1/2 x 28 threading and a 2.15-inch overall length, it fits a focused role without adding unnecessary bulk.
Why Hunters Choose the Breek Arms
Closed-tine, Fully
Shrouded design helps reduce snagging
Plan B
Mounts and fast attach suppressor
Compatible 5.56
5.56 NATO/.223 Rem and 1/2x28
Compact 2.15-inch
Overall length suits pin-and-weld builds
Nitride-finished 4140
Hardened steel construction is specified
Key Features
- Closed-tine, fully shrouded flash hider design for 5.56 NATO/.223 Rem rifles
- Built for Plan B suppressor mounts with fast-attach compatibility
- Suitable for pin-and-weld builds, including 14.5-inch barrels
- Compact 2.15-inch overall length helps keep the setup streamlined
- Weighs 2.2 ounces
- Features 1/2 x 28 TPI threading and 4140 hardened steel with nitride finish
Best Used For
- AR-15 owners building 5.56/.223 rifles with 1/2x28 threading and Plan B mounts
- Hunters wanting a compact flash hider that reduces snagging on gear
- Shooters planning pin-and-weld builds on 14.5-inch barrels for legal-length setups
- Users prioritizing a closed-tine, fully shrouded design for lower visible flash
- Night-vision users looking for reduced signature during low-light shooting
Specifications
| Caliber | 223/5.56 |
|---|---|
| Closed Tine Design | Yes |
| Engineered For 14 5 Barrels To Meet 16 Federal Minimum Length Requirement | Yes |
| Fast Attach For Plan B Suppressor Mount | Yes |
| Fully Shrouded Design | Yes |
| Material | 4140 Hardened Steel, Nitride |
| Nvg Friendly Signature Reduction | Yes |
| Overall Length | 2.15 in |
| Pin And Weld Compatible | Yes |
| Thread Pitch | 1/2 x 28 TPI |
| Weight | 2.2 oz. |
Pros
- Closed-tine, fully shrouded design helps reduce snagging on gear.
- Built for Plan B mounts and fast attach suppressor setups.
- Compatible with 5.56 NATO/.223 Rem and 1/2x28 threading.
- Compact 2.15-inch overall length suits pin-and-weld builds.
- Nitride-finished 4140 hardened steel construction is specified.
- Listed as NVG-friendly with reduced signature description.
Considerations & Trade-offs
- The closed-tine, fully shrouded design may be a better fit for users prioritizing reduced snagging and flash suppression than for those who prefer a more open muzzle device profile.
- It is built for Plan B suppressor mounts, so compatibility is more specific than a general-purpose flash hider.
- The 1/2 x 28 thread pitch and 5.56/.223 chambering narrow its use to compatible barrels and calibers.
- Its 2.15" overall length and 2.2 oz. weight are compact, but still add some length and mass at the muzzle.
Suggested Comparisons
- Muzzle brake
- Suppressor mount
- Pin-and-weld muzzle device
Suggested Accessories
- Suppressor mount
- Thread protector
- Muzzle device wrench
- Barrel shims
Frequently Asked Questions
What caliber and thread pitch is the Sentinel made for?
It is listed for .223/5.56 and uses a 1/2 x 28 TPI thread pitch.
Is this flash hider compatible with Plan B suppressor mounts?
Yes. The product description says it is built for Plan B mounts and is a fast attach option for Plan B suppressor mounts.
What design features does it have to help with snagging and flash signature?
It uses a closed-tine, fully shrouded design. The description says this is intended to improve flash suppression and reduce snagging on gear.
Can this be used on a pin-and-weld build?
Yes. The description says it is built for pin-and-weld builds and is engineered to be pinned and welded on 14.5" barrels to meet the 16" federal minimum length requirement.
What are the listed specifications?
The listed specs are: weight 2.2 oz., overall length 2.15", material 4140 hardened steel with nitride finish, thread pitch 1/2 x 28 TPI, and caliber .223/5.56.