The AR-15 Flip-Up HK-Style Front Sight – Troy BattleSight SSIG-FBS-FHBT-00 (UPC 812699010662) is a professional-grade front iron sight engineered for shooters who demand durability, repeatable zero, and a fast, intuitive sight picture. Designed by Troy Industries, this HK-style folding front sight is ideal as a primary iron sight or as a rugged backup iron sight (BUIS) for AR-15 rifles and carbines running red dots or LPVOs.
If you want a flip-up AR-15 front sight that locks solidly into place, folds flat when not in use, and provides a clean circle-in-circle sight picture, the Troy SSIG-FBS-FHBT-00 HK-Style Front Folding BattleSight is built for the job.
HK-Style Hooded Front Sight – Fast, Circle-in-Circle Sight Picture
This sight uses an HK-style hooded front housing, creating a circular ring around the front post. When paired with a peep-style rear sight, you get a natural circle-in-circle sight picture that many shooters find faster and more intuitive than traditional M4 “winged” ears.
Benefits of the HK-style design:
Rapid sight alignment under stress
Protective hood helps shield the front post from impacts
Excellent for CQB and mid-range shooting
Works seamlessly with most AR-15 rear aperture sights
Whether you’re running a fixed rear, folding rear, or co-witnessing with an optic, this HK-style front sight keeps your sight picture clean and efficient.
True Folding BattleSight – Flip-Up Front Sight for AR-15 Platforms
The Troy BattleSight SSIG-FBS-FHBT-00 is a low-profile flip-up front sight that stays out of the way until you need it. When deployed, it locks solidly upright; when folded, it lies flat to clear optics and maintain a snag-free profile.
Key folding features:
Easy to install and deploy – no complicated levers or fragile springs to fumble with
Folds down when using optics or for storage and transport
Returns to the exact same position when flipped back up, helping preserve zero
Stainless-steel cross-locking system ensures the sight remains upright and zeroed under extreme conditions
If you rely on your rifle for duty, defense, or hard training, this is the kind of battle-proven folding front sight you want on your rail.
Built from Hardened Aircraft Aluminum & Stainless Steel
The AR-15 Flip-Up HK-Style Front Sight SSIG-FBS-FHBT-00 is built to last. It’s machined from hardened aircraft aluminum with stainless steel components for maximum strength-to-weight ratio.
Construction highlights:
Hardened aircraft aluminum body resists bending and impact
Stainless-steel hardware and cross-locking components
MIL-SPEC Type III hardcoat anodized / black oxide finish for corrosion resistance and low glare
Lightweight design – approximately 1.5 oz
You get a tough, duty-ready front sight that can handle abuse on the range, in the field, or on patrol without weighing your rifle down.
Standard A2 Front Sight Post – Easy, Familiar Adjustments
Troy’s HK-style folding BattleSight is built around the standard A2 front sight post, giving you familiar adjustment and compatibility with common tools.
Adjustment details:
Uses a standard A2 front sight post with locking detent
Elevation can be adjusted with a 5.56 bullet tip or standard A2 front sight tool (not included)
Fine, repeatable adjustments – each click is approximately 0.50 MOA
Because it’s A2-compatible, you can easily swap the front post for other styles (such as tritium or thinner match posts) if desired.
Same-Plane, Picatinny-Mounted Front Sight
This flip-up HK-style front sight is designed to mount on same-plane Picatinny rail systems—meaning the rail at the front of your handguard is the same height as the rail on your upper receiver.
Mounting and compatibility:
Attaches to M1913 Picatinny rails with a secure cross-bolt clamp
Intended for same-plane rails only – not for low-profile gas blocks with a lower rail height
Positions the front sight at standard A2 height, so it lines up correctly with most AR-15 rear sights and BUIS
If your AR-15 uses a free-float handguard or monolithic upper with a continuous same-height top rail, this sight is ready to bolt on and zero.
Proven Performance – Trusted by Tactical and Professional Users
Troy BattleSights are widely trusted by Special Operations, law enforcement, and serious civilian shooters for their durability and dead-on accuracy.
Why serious shooters choose Troy HK-style folding BattleSights:
Battle-proven design with a strong reputation in the AR-15 community
Holds zero under recoil and rough handling
Provides a robust backup iron sight solution if your optic fails
Made in the USA by a respected manufacturer
If your rifle is built for real-world use—not just the safe—this sight is engineered to keep up.
Ideal Use Cases for the AR-15 Flip-Up HK-Style Front Sight
This Troy SSIG-FBS-FHBT-00 Front Folding BattleSight is perfect for:
Backup iron sights (BUIS) on optic-equipped AR-15s
Duty and patrol rifles needing rugged, low-profile irons
Home-defense carbines where reliability is critical
Training and competition builds that require fast, precise sighting
Any AR-15 shooter who prefers the HK-style hooded front sight picture
Because it flips down flush and weighs so little, it’s a no-brainer addition even if you primarily use a red dot or LPVO.
Product Specs – AR-15 Flip-Up HK-Style Front Sight SSIG-FBS-FHBT-00
Manufacturer: Troy Industries
Model: Front Folding BattleSight – HK Style
Part Number: SSIG-FBS-FHBT-00
UPC: 812699010662
Type: AR-15 flip-up HK-style front sight / BattleSight
Mounting: M1913 Picatinny rail, same-plane only
Material: Hardened aircraft aluminum with stainless steel components
Finish: Black, MIL-SPEC hardcoat anodized / black oxide
Weight: Approx. 1.5 oz
Front Post: Standard A2 front sight post, elevation adjustable with bullet tip or A2 tool
Style: HK-style hooded front with circle-in-circle sight picture
Country of Origin: Made in the USA
Why Choose the Troy SSIG-FBS-FHBT-00 AR-15 Flip-Up HK-Style Front Sight?
When you choose the AR-15 Flip-Up HK-Style Front Sight SSIG-FBS-FHBT-00 (UPC 812699010662), you’re getting:
A battle-tested Troy BattleSight trusted by professionals
HK-style hooded design for a fast, circle-in-circle sight picture
Folding, low-profile front sight that stays out of the way until needed
Hardened aircraft aluminum & stainless steel construction for serious durability
Standard A2 front sight post with easy, familiar adjustments
A sight that mounts securely to same-plane Picatinny rails and matches standard A2 sight height
For AR-15 owners who want a reliable, combat-ready flip-up HK-style front sight, the Troy SSIG-FBS-FHBT-00 is one of the most proven options on the market—equally at home on duty rifles, defensive carbines, and hard-use training builds.
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