Vector Optics ViperRay 20 Gauge Cartridge Red Laser Bore Sight (SCBCR-10) — Fast, repeatable pre-zero for 20 GA shotguns

The Vector Optics ViperRay 20 Gauge Cartridge Red Laser Bore Sight gives shotgun owners a quick, ammo-saving way to align beads, ghost-ring sights, or red-dot optics before live fire. Machined from brass in the exact shape of a 20 GA shell, it projects a bright 650 nm Class IIIA (<5 mW) laser straight down the bore axis so you can set your sight picture indoors and arrive at the range already “on paper.” Once you’re close, finish with a precise live-fire zero to account for slug trajectory or pattern characteristics.

Because the body mirrors a real 20 GA cartridge, fit is intuitive and concentric. The unit is factory pre-centered for reliable alignment, weighs just 81 g (2.8 oz), and measures a compact 68 mm (2.7″)—small enough to keep in your range bag for quick checks after travel, hard use, or optic changes.

Key Parameters

• Caliber-specific body: 20 Gauge (cartridge-style chamber insert)
• Laser: Red 650 nm, Class IIIA, <5 mW output
• Material: Brass housing with durable finish
• Length & Weight: 68 mm (2.7″); 81 g (2.8 oz)
• Power: 3 × AG13 / LR44 button cells (batteries not included due to shipping rules)
• Model / SKU: SCBCR-10 (ViperRay series)
• Factory alignment: Pre-set for centered beam out of the box

Real-World Use Cases

Slug zeroing (deer, boar, and practical matches)

Rough-in your red dot or ghost-ring for 50–100 m slug work at home. The bore-axis laser gets you close so you need only a few confirmation shots to finalize elevation and windage at your chosen distance.

Turkey & upland hunting with tight patterns

Align point-of-aim to the center of your turkey or tight upland pattern before stepping onto the patterning board. Reduce the number of shells needed to confirm where your load and choke combination prints.

Defensive & competition shotguns

After transport or a hard training block, verify zero on a fixed indoor target in seconds—especially useful for shotguns running optics or adjustable rifle-style sights.

Gunsmiths & range officers

Speed up post-service checks and sight installs. A quick chambered laser reference confirms alignment prior to handing the gun back or sending shooters to the live-fire line.

Mechanical & Build Highlights

• Cartridge-accurate geometry: Brass case dimensions seat concentrically on the bore axis for repeatable results.
• Bright, visible reference: 650 nm red dot remains easy to see on typical indoor targets for coarse alignment.
• Factory-centered emitter: Delivered pre-aligned so you can start immediately with minimal setup.
• Compact & durable: Robust brass housing stands up to frequent chambering in training and maintenance cycles.

What’s in the Box

• ViperRay 20 GA cartridge red laser bore sight (SCBCR-10)
• User instructions
• Batteries not included (requires 3 × AG13/LR44 button cells)

Compatibility & Setup Notes

• For 20 Gauge chambers only. Do not use in 12 GA, 16 GA, or other gauges.
• Safety first: Verify the shotgun is unloaded, magazine and chamber clear. Keep the muzzle pointed in a safe direction at all times.
• Initial alignment: Choose a small reference mark at an indoor distance (e.g., 5–10 m). Adjust your bead/ghost-ring or optic until point-of-aim coincides with the laser dot.
• Finalize at the range: The laser travels in a straight line; slugs and shot patterns follow a trajectory. Always confirm and refine zero or POI with your actual load and choke at your working distance.
• Battery tips: Install three AG13/LR44 cells with correct polarity, and remove between uses to prevent drain.

Technical Specifications

Summary

The ViperRay 20 GA bore-sighter is a compact, caliber-exact tool that saves time and ammunition. Its brass, cartridge-accurate body and pre-centered 650 nm Class IIIA laser put your sights or red dot close to true in minutes—so you can validate with a handful of slugs or pattern shots and head into the field with confidence.