Sightmark Boresight — Red Laser for .44 Mag Brass (SM39019 • UPC 810119011251)
Speed up sighting-in and save ammunition with the Sightmark Boresight Red Laser (Model SM39019) — a purpose-built laser boresighter that installs into a .44 Magnum–style brass shell to quickly project a bright red aiming point downrange. Ideal for handguns and rifles chambered for large-bore cartridges, this compact kit includes a battery pack and a padded carrying case, giving you everything needed to level, zero, and verify optic and iron-sight alignment without firing a single round.
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Fast, Accurate Zeroing — Save Time & Ammo
The Sightmark SM39019 boresighter is designed to dramatically reduce the time it takes to get your scope or red dot “on paper.” Insert the laser-equipped brass into your chamber, activate the red dot, and adjust your sights to align the optic with the laser point. This is an efficient first-step zeroing method that minimizes live-fire adjustments and helps you spend range time confirming and fine-tuning rather than searching for initial impact.
Purpose-Built for .44 Magnum–Style Firearms
Designed Fit: The unit mimics the dimensions of a .44 Mag cartridge for a secure, centered fit in chambers built for that round.
Large-Bore Versatility: While optimized for .44 Magnum chambers, it is useful in many large-bore handguns and rifles that accept similar-dimensioned dummy brass—check fit for non-standard chambers.
Non-Invasive: No tools or gunsmithing required — the brass-style boresight inserts and removes like a cartridge.
What’s In The Box
Sightmark Boresight (SM39019) — red laser module housed in .44 Mag–style brass
Battery Pack — batteries or battery holder included for immediate use and extended on-range sessions
Padded Carrying Case — protects the laser and accessories in transport and storage
User Manual — step-by-step setup and safety guidance
How It Works — Simple Steps
Unload and Clear: Always verify the firearm is unloaded — visually and physically check the chamber and magazine.
Insert the Boresight: Place the Sightmark brass into the chamber like a live round; it should seat securely.
Power On: Install batteries in the supplied pack and power the laser.
Align the Optic: Project the red dot on a target at a chosen distance. Adjust elevation and windage on your scope or red dot until the reticle matches the laser dot.
Confirm with Live Fire: Once aligned, fire a confirmation group at the range and make final fine adjustments as needed.
This workflow lets you get “on paper” quickly and use far fewer rounds to reach a finished zero.
Benefits & Features
Quick Initial Zeroing: Cuts the time and ammo required during the initial sight-in process.
Bright Red Laser: Clear, easy-to-see aiming point suitable for indoor range and many daylight conditions.
Portable Kit: Battery pack and padded case make it ideal for carry in range bags or tool kits.
Durable Construction: Brass-style housing provides a secure seat in the chamber and rugged handling.
User-Friendly: No technical installation — learn the process in minutes with the included instructions.
Safety & Responsible Use
Always treat firearms as loaded until you personally verify otherwise. Remove magazines and clear the chamber before inserting the boresight.
Never look directly into the laser or point it at people. Laser light can cause eye injury.
Follow local regulations about lasers and firearm accessories; some jurisdictions have restrictions on laser devices.
Use as a preliminary tool only: Boresighters speed up zeroing but are not a substitute for live-fire verification and final ballistic tuning.
Who Should Use It?
Hunters & Marksmen: Get optics roughly aligned before heading to the field.
Handgun Shooters: Ideal for large-caliber handguns where a chambered dummy round is secure and centered.
Firearm Instructors & Armorers: Quick teaching aid for demonstrating point-of-aim vs. point-of-impact.
Range Enthusiasts: Spend range time confirming zero and practicing rather than searching for the first hit.
Care & Maintenance
Remove batteries when storing the unit long-term to avoid corrosion.
Keep the brass housing and laser aperture clean and free of powder fouling.
Store in the supplied padded case to protect optics and electronics.
Replace batteries with the recommended type in the user manual to ensure consistent laser output.
Product Details (At a Glance)
Model: SM39019
UPC: 810119011251
Laser Color: Red
Intended Cartridge Style: .44 Magnum–style brass insert
Includes: Laser boresight, battery pack, padded carrying case, user manual
Use: Initial optic alignment, sight verification, training aid
Final Thoughts
The Sightmark Boresight Red Laser (.44 Mag Brass, SM39019) is a compact, practical tool that helps shooters get on-target faster and with less live-fire. With a snug brass-style fit, bright red laser point, battery pack, and protective carrying case, the SM39019 is a solid addition to any range bag for owners of compatible large-bore firearms who want to optimize their sight-in workflow.
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