Hi-Viz Back Up Iron Sights (BUIS) — Fits Picatinny | Green Tritium Front Post | Folding Front & Rear Sights — GARN21 | UPC: 613485590449
Maintain a reliable point of aim even when your optic goes down. The Hi-Viz Back Up Iron Sights (GARN21) deliver a fast-acquisition green tritium front post and low-profile folding front and rear sights that mount securely to any MIL-STD-1913/Picatinny rail. Purpose-built as a fail-safe sighting system for AR-15s, PCCs, and other modern rifles and carbines, these BUIS provide day/night visibility, rugged construction, and tool-friendly adjustments so you can stay on target in any lighting condition.
Why Choose Hi-Viz GARN21 BUIS?
Hi-Viz is known for high-visibility aiming solutions that work when seconds matter. The green tritium front sight glows on its own—no batteries required—giving you an unmistakable index point in low light, indoor ranges, dusk patrols, and emergency scenarios. Pair that with a folding micro-profile that stays out of your optic’s way until you need it, and you get dependable irons that complement red dots and LPVOs without adding bulk or snag points.
Key Features
Picatinny-Compatible: Installs on standard MIL-STD-1913 Picatinny rails—front handguard and upper receiver.
Self-Luminous Tritium Front Post (Green): Battery-free glow for 24/7 visibility and rapid front sight acquisition in low or no light.
Folding Front & Rear: Spring-assist/flip (varies by rifle setup) to deploy when needed; stays low-profile when stowed to clear optics.
Co-Witness Friendly: Ideal as primary irons or backups; position to achieve absolute or lower 1/3 co-witness with many red dots (height may vary by rail/receiver).
Rugged Construction: Built to handle recoil, range use, and field abuse; precise machining for solid lock-up.
Tool-Accessible Adjustments: Front post height and rear aperture windage allow zeroing to your preferred distance (use standard tools or supplied wrench, depending on kit).
Dual/Single Aperture Rear (Model-Dependent): Choose the aperture that best suits CQB speed or longer sight radius precision.
Note: Some specific features (e.g., rear aperture style and exact flip mechanism) may vary by production run. Always verify your rail length and receiver height standard before installation.
Performance Advantages
Always-On Aiming: The green tritium front dot guides your eye to the blade, enabling fast sight alignment when light levels drop or optics fail.
True Backup System: Keep your red dot or LPVO as primary; these BUIS fold flat and deploy in seconds to keep you in the fight.
Robust Zero: Positive detents and sturdy hardware help hold zero through transport and long training days.
Adaptable to Mission: Run rear sight open for speed, or fine-tune windage and front post elevation for precision at carbine distances.
Ideal Use Cases
Home & Property Defense: A no-battery backup that’s ready during a power outage or optic failure.
Duty/Patrol & Training: Low-light qualification and realistic scenarios where battery-free indexes shine.
Range & Competition: Co-witness setups for red dot shooters who want redundancy without sacrificing sight picture.
Preparedness/Field Use: Simple, durable irons that work in any weather with minimal maintenance.
Specifications (Quick View)
Product: Hi-Viz Back Up Iron Sights (BUIS)
Front Sight: Green tritium front post (self-luminous)
Rear Sight: Folding rear (aperture style varies by kit)
Mount Type: Picatinny (MIL-STD-1913)
Profile: Folding/flip front and rear, low profile when stowed
Adjustments: Front post elevation; rear windage (tool-friendly)
Model/SKU: GARN21
UPC: 613485590449
Compatibility: Most AR-pattern and modern sporting rifles with standard-height Picatinny rails (verify gas block/rail height before mounting the front sight)
Installation & Zeroing Tips
Mounting: Install rear sight on the receiver rail; mount front sight on a same-height Picatinny rail (avoid low gas blocks unless specified).
Torque: Tighten to manufacturer-recommended torque values; use threadlocker where appropriate.
Zero: Start at 25–36 yards for a practical carbine zero; refine at 50/100 yards as preferred.
Co-Witnessing: If running a red dot, set your BUIS for absolute or lower 1/3 co-witness based on mount height.
Confirm in Low Light: Verify the tritium front is easily indexed against the rear aperture in indoor or dusk conditions.
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Safety & Maintenance
Ensure firearm is unloaded before installation or adjustment.
Periodically check mounting screws and detents for tightness and function.
Tritium vials have a long service life; if dimming after years of use, contact the manufacturer about service options and proper disposal guidance.
The Bottom Line
The Hi-Viz Back Up Iron Sights (GARN21) combine a self-illuminating green tritium front post with folding, Picatinny-mounted front and rear sights to deliver a battle-ready, battery-free aiming solution. Whether you’re building a new AR or adding redundancy to a proven setup, these BUIS provide confidence, clarity, and control—day or night.
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