--- product_id: 51719191 title: "12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries" brand: "mosandon" price: "$28.78" currency: USD in_stock: true reviews_count: 9 category: "Mosandon" url: https://www.desertcart.us/products/51719191-12ga-red-dot-laser-bore-sight-in-chamber-cartridge-laser store_origin: US region: United States of America --- # 100-yard visible laser range Includes 2 sets (6 pcs) batteries Class IIIA red laser <5mW 12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries **Brand:** mosandon **Price:** $28.78 **Availability:** ✅ In Stock ## Summary > 🔴 Lock your shot, lead the pack. ## Quick Answers - **What is this?** 12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries by mosandon - **How much does it cost?** $28.78 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/51719191-12ga-red-dot-laser-bore-sight-in-chamber-cartridge-laser) ## Best For - mosandon enthusiasts ## Why This Product - Trusted mosandon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Double Battery Power:** Comes with two full sets of batteries for extended use—never get caught mid-session without power. - • **Plug & Play Simplicity:** Just drop the bore sighter into your 12GA chamber—no tools, no hassle, just rapid setup. - • **Compact & Lightweight Design:** At just over an ounce and 2.4 inches long, it’s the perfect portable tool for every serious marksman. - • **Long-Distance Laser Visibility:** Spot your red dot clearly up to 100 yards for fast, accurate sight adjustments in any lighting. - • **Precision Zeroing, Zero Ammo Waste:** Instantly align your shotgun scope without firing a single round—save money and time while perfecting your aim. ## Overview The MOSANDON 12GA Red Dot Laser Bore Sight is a compact, in-chamber cartridge laser designed for fast, ammo-free shotgun zeroing. Featuring a safe Class IIIA red laser with a visible range up to 100 yards, it includes two sets of batteries for extended use and fits seamlessly into 12-gauge shotguns for precise scope adjustments. ## Description Product description MOSANDON 12 gauge laser bore sight Product Advantages Made of pure brass, fine workmanship, compact structure, fit for 12 gauge caliber rifle and 12 gauge shotgun. High precision 12 gauge bore sight laser, fast gun aiming correction and zeroing, without firing any ammo. The 12 gauge bore sight comes with 2 sets of upgraded batteries. Greatly prolong the service life. Professional optical precision instrument factory manufacturing, strict and perfect quality control system to ensure product quality. How to use your 12GA laser boresighter? Prepare Boreaighter Parts 1. Unpack the laser boresighter. 2. Take out the boresighter and batteries. 3. Remove the boresighter back cover. Battery Assembly 1. Take three of the batteries. 2. Install the battery positive pole upward into the bore sighter. 3. Close the back cover of the bore sight. Load into the gun chamber 1.Set your rifile in a gun vise or other stable platform. 2.Insert the 12GA boresighter into the ampty rifle’s chamber and close the bolt. Start zero calibration 1.Align your firearm so that the laser is centered on the bull’s-eyes. 2.Adjust your scope so that the reticle of the scope matches with the laser and bull’s-dyd alignment. Boresighter Specification Please note the following...... 1.This red dot laser boresighter is completely designed according to the overall dimensions and specifications of 12 gauge gun caliber , and its structure is very compact. Therefore, there is no special power switch. It will start working after you install the battery. Since the positive pole of the button battery is in direct contact with the bore sighter shell, it is normal for the laser boresighter to start working before you close the back cover. 2.Do not dry-fire your firearm while the boresighter is inserted.Doing so may cause damage to the boresighter. 3. Avoid direct laser light to eyes. Review: Fits in my Mossberg 590s, is a strong laser. - Worked great to sight in my Crimson Trace laser saddle on my Mossberg 590s Shockwave. Has a strong laser, doubles as a cat toy. Review: Worth the buy - Lite weight. Very easy to use, makes sighting in your 12g very easy and accurate. Fits perfect just like a normal shell. Made of good quality materials. I recommend this. ## Features - SAFE: Class IIIA laser,Output power less than 5mW. - LONG RANG: The visible range of laser is as far as 100 yds, the straight red laser beam is easier to identify. and to help you adjust the scope and sight quickly and accurately. - LONG LIFE: Equipped with 2 sets of batteries(6pcs),double the service time. - EASY TO USE: Fastest gun zeroing and sighting device, you just place the boresighter in the chamber simply. - SAVING: Adjustments to sight in your scopes & sights without firing any ammo. You don’t need to use the extra ammo for honing shooting skills. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076J452WK | | Aiming Scope Sight Pin Size | 2 Inches | | Best Sellers Rank | #23,720 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #32 in Hunting Boresighters #1,839 in Hunting Equipment | | Brand | MOSANDON | | Brand Name | MOSANDON | | Color | Red Laser | | Compatible Devices | Shotgun | | Customer Reviews | 4.5 out of 5 stars 1,511 Reviews | | Included Components | 2 sets of batteries | | Item Dimensions L x W x H | 2.4"L x 0.87"W x 0.87"H | | Item Type Name | Laser Boresighter | | Item Weight | 1.13 ounces | | Magnification Maximum | 6 x | | Magnification Minimum | 1 x, 6 x | | Manufacturer | MOSANDON | | Manufacturer Part Number | MSD-12GA | | Material Type | Copper | | Model Name | 12GA Boresighter | | Model Number | MSD-12GA | | Mounting Type | Dovetail Mount | | Night vision | No | | Product Dimensions | 2.4"L x 0.87"W x 0.87"H | | Product Style | 12 Gauge Boresighter | | Reticle Type | Red Dot | | Sport | Hunting and Shooting | | Sport Type | Hunting and Shooting | | Style | 12 Gauge Boresighter | | UPC | 190149159780 | ## Product Details - **Brand:** MOSANDON - **Color:** Red Laser - **Compatible Devices:** Shotgun - **Item Weight:** 0.07 Pounds - **Magnification Maximum:** 6 x - **Magnification Minimum:** 1 x, 6 x - **Material:** Copper - **Product Dimensions:** 2.4"L x 0.87"W x 0.87"H - **Sport:** Hunting and Shooting - **Style:** 12 Gauge Boresighter ## Images ![12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - Image 1](https://m.media-amazon.com/images/I/51asNRGDIGL.jpg) ![12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - Image 2](https://m.media-amazon.com/images/I/511lBPZ0HZL.jpg) ![12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - Image 3](https://m.media-amazon.com/images/I/61RmsCuqEWL.jpg) ![12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - Image 4](https://m.media-amazon.com/images/I/51m-XPWuLhL.jpg) ![12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - Image 5](https://m.media-amazon.com/images/I/61l2H6rDCIL.jpg) ## Questions & Answers **Q: Will this work in a semi auto shotgun** A: It’s a bore sighter it will work with its caliber weather pump or semi. It’s like a single shot vs semi still same caliber regardless.... **Q: Iis there a 20 guage copy of this 12 guage red dot model.? help............. thnxx, g** A: Its a standard 12 gauge red dot laser bore sight. **Q: The directions mention On and Off positions. Where is the switch?** A: This laser sight is a compact calibration device placed in the gun chamber. There is no special power switch. It starts to work after installing the battery and tightening the back cover. Please take out the battery when it is not in use. About this, our product manual has detailed instructions. **Q: does it come with batteries** A: If I recall correctly, it does include batteries. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fits in my Mossberg 590s, is a strong laser. *by M***D on December 22, 2025* Worked great to sight in my Crimson Trace laser saddle on my Mossberg 590s Shockwave. Has a strong laser, doubles as a cat toy. ### ⭐⭐⭐⭐⭐ Worth the buy *by H***Y on June 2, 2025* Lite weight. Very easy to use, makes sighting in your 12g very easy and accurate. Fits perfect just like a normal shell. Made of good quality materials. I recommend this. ### ⭐⭐⭐⭐⭐ 12 ga red dot laser bore cartridge. *by H***R on January 1, 2026* Great item, fast shipping ## Frequently Bought Together - 12GA Red Dot Laser Bore Sight in-Chamber Cartridge Laser Bore Sighter with Two Sets Batteries - GORTAR Snap Caps Training Dummy Rounds Practice Safe Loading Firing Close to Real Weight - ST Action Pro 12 Gauge Snap Caps – Orange Safety Trainer Dummy Rounds, Reusable Dry Fire Training Ammunition (5-Pack) for Gun Owners --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/51719191-12ga-red-dot-laser-bore-sight-in-chamber-cartridge-laser](https://www.desertcart.us/products/51719191-12ga-red-dot-laser-bore-sight-in-chamber-cartridge-laser) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-21*