Strike Industries Strike Polymer Backup Sights Black Folding for AR-15 SPBUS

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) Unload and clear your rifle. Rear sight: Place on the upper receiver Picatinny rail; align and tighten the clamp screw to manufacturer torque. Front sight: Mount on a same-plane Picatinny section; verify alignment. Rough zero: Mechanical center the rear; set the front post flush. 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. The End