The Sightmark SM39018 .357 / .38 Special Boresight (Red) is a precision chamber-insert laser boresight designed for fast and accurate optic alignment on .357 Magnum and .38 Special revolvers and pistols.
Inserted like a live cartridge, it projects a bright red laser along the bore axis, enabling quick sight-in before live-fire zeroing.
Speeds up initial sighting and reduces ammunition use.
Fits directly into the chamber like a cartridge.
Provides a clear aiming reference point.
Reduces time and cost during sight-in.
| Specification | Value |
|---|---|
| Manufacturer | Sightmark |
| Model | SM39018 |
| Type | Chamber laser boresight |
| Caliber | .357 Magnum / .38 Special |
| Laser Color | Red |
| Material | Brass |
| Wavelength | 632–650 nm |
| Output Power | <1–5 mW |
| Power Source | AG5 or AG3 batteries |
| Battery Life | ~1 hour |
| Sighting Range | 15–100 yards |
| Application | Optic alignment / zeroing aid |
