Strike Industries Strike Polymer Backup Sights – Black – Folding BUIS for AR-15 (SPBUS) – UPC 793811765694

Reliable, lightweight, and ready when you need them—Strike Industries Strike Polymer Backup Sights (SPBUS) give your AR-15 a rugged, low-profile folding BUIS solution that won’t weigh down your build. Molded from impact-resistant polymer with reinforced hardware, these black flip-up sights deploy in seconds for a clear sight picture if your optic fails, your battery dies, or you simply prefer irons to confirm zero. With intuitive windage and elevation adjustments, an easy-to-acquire A2-style front post, and a dual-aperture rear, SPBUS delivers the confidence and precision you expect from Strike—minus the bulk and price tag of metal alternatives.

Why polymer BUIS? They’re lightweight, cost-effective, and corrosion-resistant, ideal for duty-ready rifles, training carbines, and minimalist builds where ounces matter but reliability is non-negotiable.

Key Benefits

• Instant backup: Spring-assisted folding design (manual flip) snaps up for a crisp sight picture when your red dot goes down.

• Featherweight strength: High-strength polymer housing and steel hardware keep the set light yet durable for real-world use.

• Streamlined profile: Ultra-low-profile when folded to minimize snags under slings, in vehicles, and through barricades.

• Tool-friendly zero: Standard A2 front post for elevation and a rear windage dial make zeroing straightforward at the range.

• Co-witness friendly: Mounts at standard AR sight height for absolute or lower 1/3 co-witness with common red dots (mount dependent).

• Budget-smart upgrade: Trusted Strike Industries design and functionality at a wallet-friendly price.

Ideal Use Cases

• Everyday AR-15 builds: A dependable backup to optics on general-purpose carbines.

• Training & classes: Durable sights that hold zero through transport and high-round-count sessions.

• Lightweight rifles: Save ounces without sacrificing a familiar iron sight picture.

• Home & truck guns: Low-profile when stowed; ready in a second if you need them.

Feature Highlights

• Front sight: A2-style elevation-adjustable post with protective ears.

• Rear sight: Dual-aperture (small/large) with windage adjustment wheel for fast daylight/low-light changes.

• Fold-flat design: Both sights fold to a slim profile; ambi-friendly flip-up action.

• Mounting: 1913 Picatinny rail clamp for upper receivers/handguards.

• Finish/Color: Black with Strike branding.

• Material: Impact-resistant polymer body with steel screws and cross-bolts.

• Model / SKU: SPBUS

• UPC: 793811765694

For best results, mount the rear sight on the upper receiver rail (not the handguard) to maintain zero. The front can mount on a same-plane gas block/rail; verify same-plane height.

What You’ll Notice on the Range

• Fast sight picture: Large aperture for close work; flip to the small aperture for precision at distance.

• Repeatable zero: Once set, adjustments stay put through recoil and drills.

• No-fuss deployment: Smooth, positive flip with a tactile click—easy to operate with gloves.

Installation (Quick Start)

1. Unload and clear your rifle.

2. Rear sight: Place on the upper receiver Picatinny rail; align and tighten the clamp screw to manufacturer torque.

3. Front sight: Mount on a same-plane Picatinny section; verify alignment.

4. Rough zero: Mechanical center the rear; set the front post flush.

5. Confirm zero: Fire 3–5 shot groups at 25–50 yards; adjust front for elevation and rear for windage. Re-confirm at your preferred distance.

Pro tip: Paint a tiny witness mark on the clamp screw to quickly confirm nothing has moved after classes or travel.

Compatibility Notes

• Platform: AR-15 and other firearms with 1913 Picatinny top rails at standard sight height.

• Co-witness: Works with common red dots; the exact co-witness (absolute or lower 1/3) depends on your optic mount height.

• Gas block height: If using a gas block, ensure it’s rail height/same-plane; do not mount on a low-profile or non-raised gas block unless specified.

Care & Maintenance

• Routine checks: Verify clamp tension and flip mechanism function during cleaning.

• Keep it clean: Brush carbon/dust from the post and apertures; a dab of oil on pivot points helps long-term.

• Protect the post: Use an A2 sight tool or the correct tool to prevent marring the front post.

Safety & Responsibility

• Always follow the four rules of firearm safety.

• Confirm zero after any hard impact, optic change, or rail reconfiguration.

• Know and follow local laws regarding transport and configuration.

Specifications (At-a-Glance)

• Brand: Strike Industries

• Product: Strike Polymer Backup Sights (Front & Rear)

• Material: Impact-resistant polymer with steel hardware

• Color: Black

• Mount: Picatinny (1913)

• Adjustments: Front elevation (A2 post), rear windage, dual-aperture

• Profile: Folding, low-profile BUIS

• Model / SKU: SPBUS

• UPC: 793811765694

Why Choose SPBUS from Strike Industries?

• Lightweight durability for modern carbines

• Proven ergonomics with fast flip-up deployment

• Affordable insurance if your electronic optic fails

SEO Highlights (Quick Scan)

• Strike Industries Strike Polymer Backup Sights SPBUS

• Black folding BUIS for AR-15 with A2 front post and dual-aperture rear

• Picatinny mount, windage/elevation adjustable, low-profile, lightweight

• UPC 793811765694

Suggested Meta Title

Strike Industries Strike Polymer Backup Sights – Black Folding BUIS for AR-15 | SPBUS | UPC 793811765694

Suggested Meta Description

Add lightweight, dependable folding irons to your AR-15 with Strike Industries’ SPBUS. Polymer BUIS with A2 front post, dual-aperture rear, windage/elevation adjustments, and Picatinny mount. Model SPBUS, UPC 793811765694.

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