20 Gauge Red Laser Bore Sighter

The 20 Gauge Red Laser Bore Sighter fits directly into the chamber like a live shell and emits a clear red laser dot—helping you centre your sights or optic before firing. Lightweight and crafted from anodised aluminium, it fits snugly and securely, making zeroing faster and more efficient. It’s a low-cost accessory that reduces ammunition waste and speeds up sight alignment, particularly useful for shotguns with iron sights or red-dot optics.

Tech Specs

Calibre Fit: 20 gauge shotgun shell chamber

Laser: Red visible laser, wavelength approx. 635–655 nm (≤ 5 mW, Class IIIA)

Construction: Anodised aluminium cartridge shell (~28 g)

Battery Type: Uses 3 × LR44 button cells (not included; on-off via end cap screw)

Alignment Range: Effective dot visibility from ~15 to 100 yards, optimal at ~25 yards

Packaging: Includes shell-style sighter; understand design is fixed bore-centred (not windage/elevation adjustable)

Why We Recommend This

• Quick and ammo-efficient sighting: Helps get your optic or iron sight roughly aligned (“on paper”) before live firing, saving rounds and time.

• Easy, secure fit: Inserts like a standard 20 gauge cartridge, positioning reliably in the chamber for repeatable results.

• Compact and field‑ready: Light and durable—perfect for field setup or quick zero efforts before shooting.

• Cost-effective tool: An inexpensive accessory that significantly speeds up sight alignment without extra equipment.

• User feedback: Shooters report that while it doesn’t replace live-fire zeroing, it consistently reduces the number of full-power rounds required to finalize zero

Buy With Confidence

✅ Free Next Day Delivery on all orders

✅ 1-Year Guarantee on all products

✅ Hassle-Free Returns

✅ Real UK-based product experts available via phone or email

✅ Trusted by thousands of UK shooters