Vector Optics ViperRay .308 Win / 7mm-08 Rem Cartridge Red Laser Bore Sight (SCBCR-04) — Fast, ammo-saving pre-zero for the .308 family
The Vector Optics ViperRay .308 Win / 7mm-08 Rem Cartridge Red Laser Bore Sight is a caliber-specific, chamber-insert laser that gets your optic on paper in minutes. Precision-machined from brass to mirror real cartridge geometry, it projects a bright 650 nm Class IIIA (<5 mW) red laser on the bore axis, so you can align a riflescope, prism, or red dot at home or on the bench before live fire. Set your reticle to the laser, then confirm and fine-tune at the range—saving premium ammunition, time, and recoil wear.
This SCBCR-04 insert also shares its parent case with other .308-based cartridges; per the manufacturer it is compatible with .308 Win and 7mm-08 Rem (and also .243 Win in many listings). The compact body weighs just 26 g, measures 45.5 mm long, and comes factory pre-centered for out-of-box accuracy. Keep it in your range kit for quick checks after transport, optic swaps, or seasonal zero confirmation.
Key Parameters
- Calibers: .308 Winchester, 7mm-08 Remington (manufacturer listings also note .243 Winchester compatibility)
- Laser: Red, 650 nm, Class IIIA, <5 mW output
- Form factor: Brass, cartridge-style chamber insert (concentric fit on the bore axis)
- Dimensions & weight: 45.5 mm (1.8″) length; 26 g (0.9 oz) net
- Power: 3 × AG3 / LR41 button cells (not included due to shipping regulations)
- Factory alignment: Pre-set, centered emitter
- Model / SKU: SCBCR-04 (ViperRay series)
Real-World Use Cases
New optics & mounts
After installing a fresh scope, base, or rings, rough-in your reticle on a fixed indoor reference. You’ll arrive at the range already on paper, needing only a few rounds to finalize a precise zero.
Pre-season & post-travel checks
Trips and temperature swings can nudge mounts. Chamber the ViperRay and confirm your reticle still overlays the laser before you burn ammo on verification groups.
Shared optics between .308-family rifles
If you rotate a scope among .308 Win and 7mm-08 rifles, the cartridge-accurate insert helps you re-index quickly and consistently, speeding the transition between platforms.
How It Works (and Why You Still Confirm at the Range)
The bore-sight laser travels in a straight line; bullets follow a curved trajectory influenced by sight height, muzzle velocity, and environmental factors. Use the laser to achieve a solid starting point indoors, then live-fire at your chosen distance (e.g., 100 m) to dial the final zero for your load.
Mechanical Build & Alignment Highlights
- Cartridge-accurate brass housing: Seats concentrically for a stable, repeatable reference point in the chamber.
- Bright, visible reference dot: 650 nm red laser gives a crisp aiming point on typical indoor targets for rapid coarse alignment.
- Factory-centered emitter: Minimizes setup time and user error; ideal for quick checks after transport or scope changes.
- Compact & durable: Pocket-size tool stands up to frequent chambering during setup and maintenance cycles.
What’s in the Box
- ViperRay .308 Win / 7mm-08 Rem red laser bore sight (SCBCR-04)
- User instructions
- Batteries not included (requires 3 × AG3 / LR41)
Compatibility & Setup Notes
- Chambering: For .308 Win and 7mm-08 Rem chambers; many official listings also note .243 Win. Do not use in .30-06, 7.62×39, 7.62×54R, .300 WM, or other .30-cal/7.62 cartridges.
- Safety first: Verify the rifle is unloaded, magazine removed, and chamber clear. Keep the muzzle in a safe direction; avoid eye exposure to the laser.
- Initial alignment: Choose a small indoor mark (5–15 m). Adjust your reticle to coincide with the laser dot.
- Finalize zero: Always confirm at the range with live ammunition at your working distance; different loads and sight heights shift point of impact.
- Battery care: Observe correct polarity; remove cells between uses to prevent drain.
Technical Specifications
| Characteristic |
Specification |
| Calibers |
.308 Winchester, 7mm-08 Remington (manufacturer listings also note .243 Win) |
| Laser Class / Output |
Class IIIA, <5 mW |
| Wavelength |
650 nm (red) |
| Housing Material |
Brass |
| Length |
45.5 mm (1.8″) |
| Weight |
26 g (0.9 oz) |
| Power Source |
3 × AG3 / LR41 button cells (not included) |
| Factory Alignment |
Pre-centered laser emitter |
| Model / Series |
SCBCR-04 / ViperRay |
Summary
The ViperRay SCBCR-04 is a simple, durable way to pre-align optics on .308 Win and 7mm-08 Rem rifles (and often .243 Win per manufacturer listings). Its brass, cartridge-accurate body and factory-centered 650 nm Class IIIA laser put your reticle close to true in minutes—so you can confirm with a handful of rounds and head into the season confident in your zero.
