Est. 2014 | USA Small Business

SureFire 623LMG-B | Forend Replacement for Mossberg 500 / 590
FREE Delivery & Lifetime Warranty
☑️ Ships for FREE from Texas*
Ships today or next day on most orders that are "In Stock". Some orders that are custom or large may take extra time to prepare.
- Free shipping is 3-10 days and requires a purchase of $70 or more, or choose a faster method at checkout. Be sure to account for the 0-2 days it will take us to pack and ship an order, in addition to the shipping speed you choose.
- All orders ship as soon as possible. We don't like waiting and you probably don't either.
- If there are delays: (Only if delays are in green, above, do we expect them), just know that we are on your side. If you're waiting, we're waiting for you, plus hundreds and sometimes thousands of others to finish being made.
- Shipping times are estimations. Items that are custom, delayed, rejected, or affected by other acts of god will take additional time.
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Address: 2491 Alluvial Ave. Clovis, CA 93611
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Return & Exchange policy:
- Summary: Don't take those sweet Instagram pics and then try to return a used item. Must be within 30 days of delivery.
- Exchanges: Realized you need a different item? That's ok! Exchanges and returns are incredibly easy.
- We are a Small Business: We do the most we can to help with return costs, but we are not Amazon and cannot take hits or losses like Amazon.
- Wrong Items: Mistakes rarely happen. Atomic Defense takes pictures of orders before they are packaged and shipped. We pay for return, recertification, and exchange shipping costs if we ever make a mistake on your orders.
- Rules for Returns: We will deduct refurbishing costs, plus materials and labor, of used products or modified products - or decline the return. This includes, but is not limited to; products with residue, smells, scratches, missing parts, debris, dents and damage. **We reserve the right to refuse returns. Refused returns shipping cost back to the buyer are not covered by Atomic Defense.
- Packaging: Ensure returns are packaged safely with thick padding on all six sides. Failure to correctly package returns may damage products and cost will be deducted from Buyer's account or return refused.
- Bulletproof products: No one else accepts returns on ballistic items. We do.** However, recertification X-Ray costs on returned ballistic items is 20%.
- Starting a return/exchange: Click here
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SureFire 623LMG-B: High-Performance WeaponLight For Enhanced Tactical Advantage
- The SureFire 623LMG-B is a professional-grade replacement forend designed specifically for Mossberg 500 / 590 shotguns, combining durability, functionality, and cutting-edge illumination.
- Recoil-proof LED technology delivers an impressive 1,000 lumens, enabling clear visibility in low-light situations and enhancing target acquisition.
- Equipped with a Total Internal Reflection (TIR) lens, it provides a beam optimized for medium to long-range use, with enough peripheral lighting for situational awareness.
- Features an intuitive and reliable switching system, including a momentary-on tape switch, a constant-on toggle switch, and a system-disable rocker switch for transport or added light security.
- Constructed with a Mil-Spec hard-anodized aluminum bezel and lightweight polymer body to withstand harsh environments and ensure long-lasting durability.
- Integrated WeaponLight system replaces the factory forend, streamlining operation and improving both functionality and ergonomics.
- Runs on two 123A batteries (included) for up to 1.25 hours of high output runtime, making it ready for any critical mission or home defense application.
- Designed, engineered, and built in the USA, ensuring trusted quality and performance.
What are some common accessories to add to the SureFire 623LMG-B?
- Picatinny Rail Attachments: Add a Picatinny rail to your shotgun for mounting additional accessories like optics or laser sights.
- Sling Mounts: Install compatible sling mounts for enhanced portability and quick access during operations.
- Extended Magazine Tubes: Increase your shotgun's shell capacity with an extended magazine tube to complement the SureFire 623LMG-B.
- Recoil Pads: Improve shooting comfort and reduce felt recoil by attaching a high-quality recoil pad to your stock.
- Weapon Cleaning Kits: Maintain optimal performance with a comprehensive cleaning kit tailored for your shotgun model.
- Shell Holders: Add side saddle shell holders for quick reloads and easy access to extra ammunition.
- Custom Grips or Stocks: Upgrade your shotgun's ergonomics with enhanced grips or stocks for better control and handling.
SureFire 623LMG-B Features and Specs
The SureFire 623LMG-B is a highly durable and expertly crafted replacement for the Mossberg 500/590 shotgun forend, featuring an integrated 1,000-lumen WeaponLight. Built with a combination of lightweight polymer and aerospace aluminum, it’s designed to withstand tough conditions while providing reliable and intuitive light activation. Its TIR lens ensures a powerful beam for both close and medium-range scenarios, while its multiple switch options—momentary-on, constant-on, and disable—make it highly adaptable.
Key Features:
- 1,000-lumen recoil-proof LED with wide reach and intense beam
- Tough polymer forend body with Mil-Spec hard-anodized aluminum bezel
- Total Internal Reflection (TIR) lens for precision lighting
- Multiple switching options for flexibility—pressure pad, constant-on, and disable toggle
- 1.25-hour runtime on two included 123A batteries
- Compact design with a length of 10.3 inches and a weight of 17.2 oz (with batteries)
- Designed and built in the USA, ensuring premium quality and performance
What's in the box of the SureFire 623LMG-B?
- (1) SureFire 623LMG-B WeaponLight Forend
- (2) 123A Lithium Batteries
- (1) User Manual
- (1) Warranty Information Card
SureFire 623LMG-B FAQs
What shotguns is the SureFire 623LMG-B compatible with?
The SureFire 623LMG-B is specifically designed as a replacement for OEM forends on Mossberg 500 and 590 shotguns. It is not compatible with other shotgun models.
How bright is the light output?
The integrated LED generates an impressive 1,000 lumens of blinding white light, making it suitable for both close- and medium-range scenarios.
How long does the battery last?
The SureFire 623LMG-B provides a runtime of approximately 1.25 hours on high output using two 123A batteries, which are included with the product.
Is the SureFire 623LMG-B Mossberg Replacement Shotgun Forend w/ Integrated WeaponLight weatherproof?
Yes, the WeaponLight is constructed with an optically coated tempered window, O-ring, and gasket seals to ensure reliable performance in adverse weather conditions.
What kind of beam does the SureFire 623LMG-B Mossberg Forend WeaponLight produce?
The Total Internal Reflection (TIR) lens focuses the light into a far-reaching, intense beam with excellent surround light, making it versatile for a variety of applications.
Can the Surefire 623LMG-B Shotgun Forend Weaponlight be deactivated for storage?
Absolutely. The 623LMG-B features an intuitive rocker switch that allows you to deactivate the light for safe storage or transport.
What materials are used to construct the forend?
The forend body is built from tough, lightweight polymer, while the WeaponLight is made from aerospace aluminum with a Mil-Spec hard-anodized finish for enhanced durability.
How much does the SureFire 623LMG-B Ultra-High-Output Forend Weaponlight for Mossberg weigh?
With batteries installed, the SureFire 623LMG-B weighs 17.2 ounces (487 grams).
Is the SureFire SureFire LED Weapon Light 628LMF-B Light Output made in the USA?
Yes, every SureFire product, including the 623LMG-B, is proudly designed and built in the USA to ensure the highest quality and performance standards.