---
product_id: 1304597
title: "Centerfire Boresight with Red Laser"
brand: "sightmark"
price: "S$70"
currency: SGD
in_stock: true
reviews_count: 8
category: "Sightmark"
url: https://www.desertcart.sg/products/1304597-centerfire-boresight-with-red-laser
store_origin: SG
region: Singapore
---

# ±0 MOA precision alignment <5mW low-power red laser Durable brass construction Centerfire Boresight with Red Laser

**Brand:** sightmark
**Price:** S$70
**Availability:** ✅ In Stock

## Summary

> 🎯 Lock in your aim, zero in on victory.

## Quick Answers

- **What is this?** Centerfire Boresight with Red Laser by sightmark
- **How much does it cost?** S$70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/1304597-centerfire-boresight-with-red-laser)

## Best For

- sightmark enthusiasts

## Why This Product

- Trusted sightmark brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Rugged brass body withstands recoil and rough handling, ensuring consistent performance shot after shot.
- • **Save Ammo, Save Time:** Chamber-load design lets you zero your sights without firing a single round—cut down on costly practice sessions.
- • **Compact & Travel-Ready:** Lightweight and pocket-sized with a ballistic nylon pouch, ready to accompany you on every hunt or range day.
- • **Pinpoint Accuracy Every Time:** Achieve flawless zeroing with a laser perfectly aligned to your barrel axis—no guesswork, no wasted rounds.
- • **Trusted by Pros & Enthusiasts:** NTOA recommended and top-rated by thousands, this boresight is the secret weapon for serious shooters.

## Overview

The Sightmark Centerfire Boresight with Red Laser is a precision chamber-load laser tool designed for effortless zeroing of rifles and shotguns. Featuring a low-power 5mW red laser (632-650nm) perfectly aligned with the barrel axis, it delivers accurate sight calibration without firing a shot. Constructed from durable brass and accompanied by a ballistic nylon carrying case, it offers portability and resilience for hunters, competitive shooters, and law enforcement alike. This boresight reduces ammo waste, saves time, and is backed by a strong reputation for quality and reliability.

## Description

desertcart.com The Sightmark Laser Boresight provides a convenient, accurate, and cost effective method for sighting in rifles and shotguns of all types. Easy-to-use, simply chamber the boresight like a regular bullet and a laser dot will show exactly where the rifle is aiming--without firing a single shot. Perfect for hunters, competitive shooters, and law enforcement, the Sightmark Laser Boresight offers a 15 to 100 foot sighting range with a 632 to 650 nm laser wavelength. The boresight comes with a lightweight carrying pouch to protect the laser for in the field.Specifications:Laser Wavelength (nm:) 632 to 650 LED Type: visible red laser Sighting Range: 15 to 100 yards Dot Size: 2 inches at 100 yards Operation: On/Off End Cap Construction: Brass Temperature: -10 to 50 Celsius Power: <5 mW Battery Type: two AG5 or three AG3) Battery Life: one hour Product Description Tested and recommended by the NTOA, the Sightmark.223 Boresight significantly reduces wasted cartridges and shells. Chamber the device in your .223 rifle like a regular cartridge, and a red laser dot shows exactly where you're aiming. Simply adjust your sights or scope, and save your extra ammo for the hunt. Includes a carrying case, three (3) AG3 batteries, and instructions.

Review: Works great. Get the silver oxide SG5 batteries - I have four of the Sightmark laser boresights - the 12 gauge, 9mm, 7.62x39mm, and .223. I had used a Bushnell laser boresight before getting this set of chamber loaded laser boresights. The Bushnell is the kind that you stick into the muzzle end of the gun, fitted with an arbor matched to the barrel size. The problem with this device was that the arbors never fit quite right - they were always either too tight or too loose, plus you had to try to seat the body of the boresight in the center of the opening of the barrel (or muzzle brake) in order to properly align the center axis of the boresight with the center axis of the barrel. This rarely if ever happened just right as the slightest tilt in the seating of this boresight in the barrel would take it off the center axis so that rotating the laser would cause the laser light to mark out a small circle that was several MOA in diameter rather than being dead centered. Ugh. Of course with these chamber loaded laser boresights, there is also the potential for the lasers to be mis-aligned off the center axis. Plus there is the potential for the boresight to not fit the chamber properly. The key is to find a brand that has a measure of quality control so that you aren't stuck with these problems. I read through a lot of reviews before deciding on Sightmark. It is definitely not the cheapest out there. There are so many different brands and generic versions of these chamber loaded laser boresights now that almost look alike, with many much cheaper than the Sightmark. However, it was clear from reading the reviews that as the prices went down, so did the quality control. Several of these cheaper brands came with complaints that the lasers were not aligned to the center axis (resulting in the laser painting a circle as it rotates in the chamber) or that they did not fit properly in the chambers and so would either get stuck or wiggle. I have this theory that the really cheap laser boresights must be factory seconds or some such. I considered the Osprey line with the adjustable arbors, which saves money by allowing you to use one laser bore sight for different calibers. But, the reviews indicated that hassling with arbors would have an effect on accuracy and reliability. I almost got the Firefield, which seemed to have a similar number of decent reviews. Ultimately I decided against it because the entire line is made of an aluminum shell, and I think the brass shell of the Sightmark will hold up better. It should be noted, however, that the 12 gauge Sitemark is made out of aluminum, unlike the others, and is only painted a brass color. The biggest complaint against all of these laser boresighters are the frequent DOA batteries and poor battery life. The Sightmarks all come with alkaline button cell batteries. The small caliber ones (9mm, 7.62mm, .223) come with two AG5 batteries while the 12 gauge came with three AG13 (LR44) batteries. To get you all confused, the printed information on the back of the packaging for the 7.62mm and .223 says you can use 3 AG3 batteries in place of the 2 AG5 batteries (since the AG3 is a thinner battery with the same 7.9mm diameter), while the printed info for the 12 gauge says you can use 2 AG5 or 3 AG13 batteries. This is flat out incorrect since 2 AG5 batteries are too small to fit into the 12 gauge Sightmark battery chamber. Confused? Go to wikipedia and look up the article "List of battery sizes". Scroll down to the section titled "Silver oxide and alkaline cells". The table lists all the different names for each battery, their dimensions, and their mAh power rating. Note how the silver oxide batteries contain 1-1/2 to two times as much energy as the alkaline batteries. So the key is to go out and get some silver oxide button batteries, size SG5 for the AG5 powered Sightmarks and SG13 for the AG13 powered lasers. And don't go to your nearest retail store, since that will cost you an arm and a leg. Google shop for these batteries online. I found two Made in China "brands" one called Vinnic and another by Chung Pak Battery Works which were pretty cheap. The names aren't important, since I'm sure they will change rapidly. Just remember to get some silver oxide batteries online at the same time you are getting these Sightmark bore sights. How well did these Sightmarks work? The very first time I used one (the 7.62x39mm), I plugged in the included AG5 alkaline batteries and the resulting laser light was exceedingly weak. My initial reaction was that this was a bad laser. Then I remembered the silver oxide batteries I had gotten. When I switched out the batteries, the laser suddenly glowed brightly. Later, when this set of silver batteries finally wore down, the laser light faded again. That's a sign to change batteries. The larger AG13 alkaline batteries for the 12gauge shotgun boresight worked reasonably well and are still working as of this writing. Not surprising, since these batteries pack a lot more energy than the small AG5 batteries. As many have noted, the Sightmarks do not have an on-off switch. Once the batteries are screwed in the laser light is on! This is just as well, since the bore sights have to flush fit inside the chamber of the barrel and endure having the bolt and firing pin slammed into them. But you do have to have a plan of action ready so as to not run down your batteries. With one pair of SG5 silver oxide batteries, I was able to adjust the sights for about four guns, each taking about 5-10 minutes. So I am guesstimating a battery life of about 30 minutes with a fresh pair of SG5 silver batteries (the Sightmark packaging claims up to an hour of battery life - hah!). All of the Sightmarks have fit in well, none have gotten stuck (so far), and none have had off-center lasers. These chamber loaded Sightmark boresighters make it easy to dial in a scope, and for fixed sights, they help confirm the aim points. They are much better than the muzzle loaded bore sights, although the total cost is a lot more since they are ammo caliber specific.
Review: Excellent idea, and a must-have for zeroing your rifle - CONSTRUCTION: The laser body is made of sturdy brass, nicely finished, and with an excellent fit for the firearm caliber. The version I purchased is for a .308 Win caliber rifle. The laser is perfectly aligned with the barrel axis, so it won't make fringes once it's manually placed in the chamber. If you follow the instructions that came with the laser you'll zero in your rifle in no time...and without spending a lot of rounds in the process. (A note to semi-auto firearm users, such as M1As: after manually inserting the sight laser into the chamber, do NOT slam the action as you would with a normal round - this will damage the laser. Instead, SLOWLY advance the action until it closes the breech. This note is in the user's manual, too, but it won't hurt to note it twice.) ACCESSORIES: The laser comes with a small holster for storage, made of ballistic nylon. The holster is large enough to store the laser, its batteries and the user's manual. {However, it is small enough to lose it, too. ;-) }. It comes with a set of two button-size batteries (LR 754). Some things to note: - it's not a high-intensity laser. Therefore, you may have difficulty seeing the laser beam at 25 yards in the open on a very sunny day. - due to its size, the laser uses two button batteries (LR 754), and those don't last a long time. My recommendation is to keep the batteries in the provided pouch until ready to use, and to carry a spare set just in case. CONCLUSION: For what it was designed, it does an excellent job. I wish the laser intensity would be higher, or be of a different wavelength (color; e.g. green) for better visibility in bright, sunny light. I will definitely buy it again if I lose or damage it (I hope I won't), provided the company is still there if that happens.

## Features

- <5mW 632-650nm Class IIIA Red Laser: Precision boresighting with a safe, visible reference point. Align sights accurately with this low-power output device, ensuring greater zeroing accuracy for enhanced performance.
- Precision Accuracy: This boresighting tool offers exceptional precision, ensuring that your sights or optics align precisely. It eliminates guesswork and enhances accuracy, making it an invaluable asset for zeroing.
- Durable Bore Sight: Built for repeated use, ensuring precise alignment and calibration. Withstands recoil and rough handling during zeroing. Maintains accuracy over time, essential for enthusiasts and professionals.
- Precision Zeroing, Less Waste: Swiftly aligns sights to bore, minimizing cartridge waste. Saves time and costs, an ideal solution for hunters.
- Easy to pack and travel: Its small and lightweight design make it a convenient and portable accessory for shooters who require efficient zeroing and improved accuracy in the field.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001BVI982 |
| Best Sellers Rank | #17,676 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #37 in Hunting Boresighters |
| Brand | Sightmark |
| Brand Name | Sightmark |
| Color | .223, 5.56x45 NATO |
| Compatible Devices | Firearm |
| Customer Reviews | 4.2 out of 5 stars 9,792 Reviews |
| Global Trade Identification Number | 00810119010001 |
| Included Components | Carrying case, Battery pack |
| Item Dimensions L x W x H | 9"L x 6"W x 1"H |
| Item Type Name | Boresight with Red Laser |
| Item Weight | 0.06 Kilograms |
| Magnification Maximum | 1 x |
| Manufacturer | Sellmark Corporation |
| Material Type | Brass |
| Mounting Type | Integral Mount |
| Night vision | No |
| Objective Lens Diameter | 45 Millimeters |
| Product Dimensions | 9"L x 6"W x 1"H |
| Product Style | .223, 5.56x45 NATO |
| Reticle Type | Single Dot |
| Sport | Hunting |
| Sport Type | Hunting |
| Style | .223, 5.56x45 NATO |
| UPC | 604945320713 810119010001 024145113371 |
| Unit Count | 1.0 Ounce |
| Warranty Description | Limited Lifetime Warranty |

## Product Details

- **Brand:** Sightmark
- **Color:** .223, 5.56x45 NATO
- **Style:** .223, 5.56x45 NATO
- **Product Dimensions:** 9"L x 6"W x 1"H
- **Sport:** Hunting
- **Item Weight:** 0.06 Kilograms
- **Material:** Brass
- **Objective Lens Diameter:** 45 Millimeters
- **Compatible Devices:** Firearm
- **Mounting Type:** Integral Mount

## Images

![Centerfire Boresight with Red Laser - Image 1](https://m.media-amazon.com/images/I/512FwZPIYfL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great. Get the silver oxide SG5 batteries
*by D***D on September 25, 2011*

I have four of the Sightmark laser boresights - the 12 gauge, 9mm, 7.62x39mm, and .223. I had used a Bushnell laser boresight before getting this set of chamber loaded laser boresights. The Bushnell is the kind that you stick into the muzzle end of the gun, fitted with an arbor matched to the barrel size. The problem with this device was that the arbors never fit quite right - they were always either too tight or too loose, plus you had to try to seat the body of the boresight in the center of the opening of the barrel (or muzzle brake) in order to properly align the center axis of the boresight with the center axis of the barrel. This rarely if ever happened just right as the slightest tilt in the seating of this boresight in the barrel would take it off the center axis so that rotating the laser would cause the laser light to mark out a small circle that was several MOA in diameter rather than being dead centered. Ugh. Of course with these chamber loaded laser boresights, there is also the potential for the lasers to be mis-aligned off the center axis. Plus there is the potential for the boresight to not fit the chamber properly. The key is to find a brand that has a measure of quality control so that you aren't stuck with these problems. I read through a lot of reviews before deciding on Sightmark. It is definitely not the cheapest out there. There are so many different brands and generic versions of these chamber loaded laser boresights now that almost look alike, with many much cheaper than the Sightmark. However, it was clear from reading the reviews that as the prices went down, so did the quality control. Several of these cheaper brands came with complaints that the lasers were not aligned to the center axis (resulting in the laser painting a circle as it rotates in the chamber) or that they did not fit properly in the chambers and so would either get stuck or wiggle. I have this theory that the really cheap laser boresights must be factory seconds or some such. I considered the Osprey line with the adjustable arbors, which saves money by allowing you to use one laser bore sight for different calibers. But, the reviews indicated that hassling with arbors would have an effect on accuracy and reliability. I almost got the Firefield, which seemed to have a similar number of decent reviews. Ultimately I decided against it because the entire line is made of an aluminum shell, and I think the brass shell of the Sightmark will hold up better. It should be noted, however, that the 12 gauge Sitemark is made out of aluminum, unlike the others, and is only painted a brass color. The biggest complaint against all of these laser boresighters are the frequent DOA batteries and poor battery life. The Sightmarks all come with alkaline button cell batteries. The small caliber ones (9mm, 7.62mm, .223) come with two AG5 batteries while the 12 gauge came with three AG13 (LR44) batteries. To get you all confused, the printed information on the back of the packaging for the 7.62mm and .223 says you can use 3 AG3 batteries in place of the 2 AG5 batteries (since the AG3 is a thinner battery with the same 7.9mm diameter), while the printed info for the 12 gauge says you can use 2 AG5 or 3 AG13 batteries. This is flat out incorrect since 2 AG5 batteries are too small to fit into the 12 gauge Sightmark battery chamber. Confused? Go to wikipedia and look up the article "List of battery sizes". Scroll down to the section titled "Silver oxide and alkaline cells". The table lists all the different names for each battery, their dimensions, and their mAh power rating. Note how the silver oxide batteries contain 1-1/2 to two times as much energy as the alkaline batteries. So the key is to go out and get some silver oxide button batteries, size SG5 for the AG5 powered Sightmarks and SG13 for the AG13 powered lasers. And don't go to your nearest retail store, since that will cost you an arm and a leg. Google shop for these batteries online. I found two Made in China "brands" one called Vinnic and another by Chung Pak Battery Works which were pretty cheap. The names aren't important, since I'm sure they will change rapidly. Just remember to get some silver oxide batteries online at the same time you are getting these Sightmark bore sights. How well did these Sightmarks work? The very first time I used one (the 7.62x39mm), I plugged in the included AG5 alkaline batteries and the resulting laser light was exceedingly weak. My initial reaction was that this was a bad laser. Then I remembered the silver oxide batteries I had gotten. When I switched out the batteries, the laser suddenly glowed brightly. Later, when this set of silver batteries finally wore down, the laser light faded again. That's a sign to change batteries. The larger AG13 alkaline batteries for the 12gauge shotgun boresight worked reasonably well and are still working as of this writing. Not surprising, since these batteries pack a lot more energy than the small AG5 batteries. As many have noted, the Sightmarks do not have an on-off switch. Once the batteries are screwed in the laser light is on! This is just as well, since the bore sights have to flush fit inside the chamber of the barrel and endure having the bolt and firing pin slammed into them. But you do have to have a plan of action ready so as to not run down your batteries. With one pair of SG5 silver oxide batteries, I was able to adjust the sights for about four guns, each taking about 5-10 minutes. So I am guesstimating a battery life of about 30 minutes with a fresh pair of SG5 silver batteries (the Sightmark packaging claims up to an hour of battery life - hah!). All of the Sightmarks have fit in well, none have gotten stuck (so far), and none have had off-center lasers. These chamber loaded Sightmark boresighters make it easy to dial in a scope, and for fixed sights, they help confirm the aim points. They are much better than the muzzle loaded bore sights, although the total cost is a lot more since they are ammo caliber specific.

### ⭐⭐⭐⭐⭐ Excellent idea, and a must-have for zeroing your rifle
*by A***N on November 16, 2024*

CONSTRUCTION: The laser body is made of sturdy brass, nicely finished, and with an excellent fit for the firearm caliber. The version I purchased is for a .308 Win caliber rifle. The laser is perfectly aligned with the barrel axis, so it won't make fringes once it's manually placed in the chamber. If you follow the instructions that came with the laser you'll zero in your rifle in no time...and without spending a lot of rounds in the process. (A note to semi-auto firearm users, such as M1As: after manually inserting the sight laser into the chamber, do NOT slam the action as you would with a normal round - this will damage the laser. Instead, SLOWLY advance the action until it closes the breech. This note is in the user's manual, too, but it won't hurt to note it twice.) ACCESSORIES: The laser comes with a small holster for storage, made of ballistic nylon. The holster is large enough to store the laser, its batteries and the user's manual. {However, it is small enough to lose it, too. ;-) }. It comes with a set of two button-size batteries (LR 754). Some things to note: - it's not a high-intensity laser. Therefore, you may have difficulty seeing the laser beam at 25 yards in the open on a very sunny day. - due to its size, the laser uses two button batteries (LR 754), and those don't last a long time. My recommendation is to keep the batteries in the provided pouch until ready to use, and to carry a spare set just in case. CONCLUSION: For what it was designed, it does an excellent job. I wish the laser intensity would be higher, or be of a different wavelength (color; e.g. green) for better visibility in bright, sunny light. I will definitely buy it again if I lose or damage it (I hope I won't), provided the company is still there if that happens.

### ⭐⭐⭐⭐ Boresight itself works well, but it comes with lousy batteries.
*by C***S on November 23, 2025*

Got this to sight in the Leupold DeltaPoint Pro red dot sight for my Ruger AR556 .300 Blackout. The sight itself worked just fine in getting me on paper, its easy to use, just put it in the chamber and close the blot, and it fits in the chamber well. It was decently accurate, I was able to get to zero with about 25 rounds. Although I'm only giving it four stars because it comes with really cheap batteries, they had a very short life span and were drained to the point that I could barely see the laser after 5 minutes of use. I'd recommend getting some Duracell AG3 or LR736 batteries for it if you are planning on using it for multiple guns.

## Frequently Bought Together

- Sightmark Centerfire Boresight with Red Laser
- Sightmark RimFire Brass Boresight with Red Laser

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-28*