The Aimshot Laser Boresighter Cartridge .223 Rem Brass (BS223, UPC 669256002239) is a compact, chamber-mounted laser boresight designed to get your .223 Rem / 5.56x45mm rifles on paper fast—saving you time, ammo, and frustration at the range. Machined from durable brass and built around a 650nm red laser, this boresighter lets you quickly align your optic or iron sights from the comfort of the bench before you ever fire a live round. AimShot+1
If you want a reliable .223/5.56 laser boresighter that’s also the foundation of a full multi-caliber system, the Aimshot BS223 is one of the most proven and popular options on the market.
Chamber-Style Laser Boresighter for .223 / 5.56 Rifles
The Aimshot BS223 is designed to fit directly into the chamber of rifles chambered in .223 Remington / 5.56x45mm NATO:
Cartridge-style design – Inserts into your rifle’s chamber just like a live round. Gunbuyer+1
Projects a red laser dot down your bore, giving you a visual reference point.
Align your scope or red dot to the laser at a known distance (commonly 20 yards) to get “on paper” before live fire. AimShot+1
This makes initial zeroing much faster and more efficient, especially with freshly mounted optics or new builds.
Part of the Aimshot Modular Bore Sight System
One of the biggest advantages of the BS223 is that it’s the core laser module for Aimshot’s modular boresight system:
Designed as the base laser for rifle calibers.
Works with Aimshot caliber-specific arbors (sold separately) to bore sight additional calibers beyond .223/5.56. AimShot+2floridagunexchange.com+2
With the right arbor, you can bore sight a wide range of calibers—such as .243, .308, 7mm-08, and many more—using the same laser module. AimShot+1
That means you’re not buying a separate laser for every rifle. Instead, you invest once in the BS223 and expand with inexpensive arbors as your collection grows.
Durable Brass Construction for Repeatable Alignment
The Aimshot BS223 laser boresighter is built from brass, giving it:
Excellent chamber fit and repeatability—brass is the same material used for many live cartridges. Gunbuyer+1
Good resistance to deformation when inserted and removed multiple times.
A quality feel that stands up to frequent use on the bench or at the range.
Combined with Aimshot’s precision engineering, the brass body helps keep the laser beam centered down the bore, which is critical for accurate bore sighting.
650nm Red Laser – Bright, Practical, and Efficient
The BS223 uses a 650nm red laser output: AimShot+1
Produces a bright red dot that’s easy to see indoors and at typical bore-sighting distances outdoors.
Ideal for zeroing at shorter ranges (commonly 20–25 yards), then confirming and fine-tuning at your preferred live-fire zero distance (e.g., 50 or 100 yards). AimShot+1
Class IIIa laser output (<5mW) as listed by Aimshot, offering safe, effective visibility when used as directed. AimShot
This laser makes it easy to roughly align your optic or irons so you’re not “searching for paper” during your first live shots.
Powered by Button Cell Batteries – Ready to Use
The Aimshot Laser Boresighter .223 Rem is powered by 3 L736 / LR41 button cell batteries, and typically includes multiple sets in the package: AimShot+2floridagunexchange.com+2
Uses three button cell batteries installed inside the brass cartridge.
Provides approximately 10 minutes of continuous runtime per set—enough time to bore sight multiple rifles or optics in one session. Gunbuyer+1
Additional batteries are inexpensive and easy to stock in your range kit.
Aimshot also offers an optional modular battery pack (sold separately) that can transform the BS223 into the MBS223 system, with extended run-time using AAA batteries. AimShot
Save Time, Save Ammo, and Get on Paper Fast
Using the BS223 can dramatically streamline your zeroing process:
Ensure your rifle is unloaded and safe.
Insert the brass laser cartridge into the chamber.
Aim the rifle at a target 15–25 yards away.
Adjust your optic or irons so the reticle aligns with the laser dot. AimShot+1
Remove the boresighter and head to the range to confirm with live fire.
Because you’re already close to zero, you’ll typically need only a few rounds to fine-tune, instead of wasting an entire box just to find the target.
Ideal for New Builds, Optic Swaps, and Multi-Rifle Owners
The Aimshot BS223 Laser Boresighter Cartridge is especially useful if you:
Frequently mount new scopes, red dots, or LPVOs on AR-15 rifles.
Have multiple .223/5.56 platforms and want a fast, repeatable way to zero each.
Own several other rifle calibers and want to expand the system with affordable arbors instead of buying separate boresighters. AimShot+2floridagunexchange.com+2
Prefer to save match or premium ammo by doing most of your coarse adjustments with a laser first.
For gunsmiths, instructors, and serious hobbyists, the time and ammo savings quickly justify the tool.
Compact and Easy to Carry in a Range Bag
With its small, cartridge-sized profile, the BS223 is:
Easy to store in a range bag, tool pouch, or rifle case.
Quick to deploy whenever you need to re-zero after maintenance or optic changes.
Simple to loan or share among friends at the range.
It’s a handy “always with you” solution for zero checks and quick sight setups.
Key Specifications – Aimshot BS223 Laser Boresighter Cartridge
From manufacturer and retailer listings: AimShot+2floridagunexchange.com+2
Manufacturer: Aimshot
Model: BS223 Laser Boresighter Cartridge
Caliber Fit: .223 Remington / 5.56x45mm (chamber-mounted)
Material: Brass
Laser Wavelength: 650nm (red)
Laser Class: <5mW, Class IIIa (per Aimshot)
Power Source: (3) L736 / LR41 button cell batteries
Approximate Runtime: ~10 minutes continuous use per battery set
Style: Cartridge boresight module (chamber mount)
Compatibility: Basis for Aimshot modular boresight system (works with Aimshot arbors for many other calibers)
Part Number / SKU: BS223
UPC: 669256002239
These specs make it easy to confirm you’re selecting the correct Aimshot .223 laser boresighter cartridge for your rifle and accessory system.
Why Choose the Aimshot BS223 .223 Rem Laser Boresighter?
Choose this boresighter if you:
Want a fast, cost-effective way to bore sight .223/5.56 rifles.
Like the idea of a modular system that can expand to other calibers with arbors instead of separate lasers.
Prefer a brass, chamber-style design for reliable fit and repeatability.
Want to save time and ammo by getting “on paper” at short range before live-fire zeroing.
For AR-15 owners, precision rifle shooters, and anyone who regularly works with .223/5.56 platforms, the Aimshot Laser Boresighter Cartridge .223 Rem Brass (BS223 / 669256002239) is a practical, high-value tool that pays for itself in saved ammo and simpler zeroing sessions.
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