The Aimshot 9mm Laser Bore Sight with External Battery Box – Red (BS9 / BS9MM, UPC 669256000099) is a professional-grade boresighter designed to get your 9mm pistols and carbines on target fast, while delivering extended run time thanks to its external battery box. Featuring a bright red laser, robust construction, and Aimshot’s proven modular design, this system is perfect for shooters, instructors, and gunsmiths who regularly mount or re-zero optics on 9mm platforms and want to save time and ammo.
If you’re searching for a reliable 9mm red laser boresighter with external battery pack, the Aimshot BS9 / BS9MM is a smart, high-value tool that makes zeroing optics and iron sights quick, easy, and precise.
Chamber-Style 9mm Laser Bore Sight for Realistic Alignment
The Aimshot BS9 / BS9MM is designed as a cartridge-style laser bore sight that mimics a live 9mm Luger round:
Inserts directly into the chamber of your 9mm pistol or carbine.
Centers the laser along the true bore axis for more accurate alignment than muzzle-only devices.
Works great with popular 9mm pistols, pistol-caliber carbines (PCCs), and AR-9 platforms that are chambered in 9x19mm.
Chamber-mounted boresighters like the BS9 are a preferred choice for shooters who demand consistent, repeatable alignment across multiple firearms.
External Battery Box – Longer Run Time and Easy Operation
What sets this model apart is its external battery box, which connects to the cartridge via a thin wire:
Extended run time compared to self-contained button-cell boresighters.
Batteries are housed in a separate, easy-access external box, making replacements quick and simple.
Reduces the need to constantly open the boresighter body to change batteries, which can disturb alignment and wear components over time.
Ideal for instructors, gunsmiths, and serious shooters who may bore sight multiple guns in a single session.
The external battery pack design makes this 9mm boresight more practical for frequent use than typical self-contained units.
Bright Red Laser for Fast, Visible Alignment
The Aimshot 9mm bore sight projects a bright red laser down the bore:
Provides a clear, visible dot on your target at typical bore-sighting distances (commonly 10–25 yards).
Allows you to align red dots, pistol optics, and iron sights quickly before live fire.
Works indoors and in many outdoor lighting conditions typical of zeroing sessions.
Using a red laser boresighter helps you get “on paper” immediately, so you’re not wasting time and ammo just trying to find your hits.
Save Time and Ammo When Zeroing Your 9mm
With the Aimshot BS9 / BS9MM, you can dramatically streamline the sight-in process:
Ensure your firearm is unloaded and safe.
Insert the laser boresight cartridge into the chamber.
Place the external battery box where it won’t interfere with the firearm.
Aim at a target (usually 10–25 yards away).
Adjust your optic or irons so that your point of aim matches the laser dot.
Remove the boresighter and confirm your zero with a few live rounds.
You’ll typically need far fewer live rounds to finalize your zero because you’re starting much closer to point of impact.
Ideal for Optic Mounting, Re-Zeroing, and Multi-Gun Setups
This Aimshot 9mm external battery bore sight is especially useful if you:
Frequently swap optics or slides on 9mm pistols.
Set up or maintain PCCs and AR-9 carbines with red dots or LPVOs.
Own multiple 9mm firearms and want a consistent, repeatable baseline when sighting in each one.
Teach classes or run a shop where you’re constantly mounting and zeroing optics.
Instead of guessing where your first shots will land, you get a reliable visual reference before you ever pull the trigger.
Compact, Durable, and Range-Bag Friendly
Both the 9mm laser cartridge and the external battery box are compact and lightweight:
Easy to store in a range bag, toolbox, or pistol case.
Durable enough for frequent use by enthusiasts and professionals.
The slim wire to the battery box is easy to route out of the ejection port while still allowing you to shoulder, aim, and steady the firearm for boresighting.
Whether you’re at home on the bench or at an indoor range, this compact system is simple to deploy and pack away.
Great for Red Dots, Pistol Optics, and Iron Sights
The Aimshot BS9 / BS9MM is compatible with nearly any sighting system:
Red dot sights – Perfect for co-witness or offset setups on pistol slides or PCCs.
Pistol optics – Great for quickly aligning slide-mounted reflex or enclosed emitter optics.
Iron sights – Rapidly check or adjust sight heights after changing slides or barrels.
Using a boresighter before live-fire zeroing saves valuable ammo—especially useful with defensive or +P ammunition.
Perfect for Gunsmiths, Instructors, and Serious Shooters
Because of the external battery box and reusable design, this boresighter is a powerful tool for:
Gunsmiths and armorers who mount optics or sight new builds regularly.
Instructors and training facilities that need to quickly set up or check multiple guns.
Competitive shooters who travel with multiple pistols or PCCs and want to verify zero after transport.
Everyday shooters who like to fine-tune or double-check sight alignment without burning through boxes of ammo.
It’s one of those tools that quickly pays for itself in saved time and ammunition.
Key Features – Aimshot 9mm Laser Bore Sight with External Battery Box (BS9 / BS9MM)
Manufacturer: Aimshot
Model: 9mm Laser Boresighter with External Battery Box
Laser Color: Red
Caliber: 9mm Luger (9x19mm)
Design: Cartridge-style chamber boresight with external battery pack
Use Case: Zeroing and verifying optics / sights on 9mm pistols and carbines
Part Numbers: BS9 / BS9MM
UPC: 669256000099
These specs make it easy to confirm you’re choosing the correct Aimshot 9mm boresight with external battery box for your needs.
Why Choose the Aimshot BS9 / BS9MM 9mm Bore Sight with External Battery Box?
You should consider this system if you:
Want a professional-grade 9mm laser boresighter that’s designed for frequent use.
Need longer run time and easy battery changes thanks to the external battery box.
Regularly mount or re-zero optics on 9mm pistols or pistol-caliber carbines.
Want to save time, frustration, and ammunition every time you zero a firearm.
For serious handgun shooters, PCC competitors, gunsmiths, and instructors, the Aimshot Bore Sight 9mm with External Battery Box Red (BS9 / BS9MM / 669256000099) is a reliable, efficient, and highly practical tool that makes zeroing faster and more precise.
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