---
product_id: 430311497
title: "NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit"
brand: "ndz performance"
price: "S$42"
currency: SGD
in_stock: true
reviews_count: 8
category: "Ndz Performance"
url: https://www.desertcart.sg/products/430311497-ndz-performance-safety-replacement-kit-for-mossberg-500-590-88
store_origin: SG
region: Singapore
---

# CNC machined billet aluminum Enhanced ridged ergonomic design Proudly made in USA NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit

**Brand:** ndz performance
**Price:** S$42
**Availability:** ✅ In Stock

## Summary

> 🛡️ Upgrade Your Safety, Own the Range — Precision Meets Performance

## Quick Answers

- **What is this?** NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit by ndz performance
- **How much does it cost?** S$42 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/430311497-ndz-performance-safety-replacement-kit-for-mossberg-500-590-88)

## Best For

- ndz performance enthusiasts

## Why This Product

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

## Key Features

- • **Ergonomic Safety Upgrade:** Improved ridges guide your finger naturally for secure, comfortable control under pressure.
- • **Complete Installation Kit:** Includes safety, cap screw, Allen key, ball detent, and steel plate for seamless upgrade.
- • **Anodized & Cerakoted Finish:** Hardcoat anodizing or Cerakote options provide extreme durability and a sleek tactical look.
- • **Precision CNC Machined Aluminum:** Durable 6061 T6 billet aluminum ensures a perfect OEM fit and lifetime resilience.
- • **Universal Fit for Mossberg Models:** Compatible with 12 & 20 gauge Mossberg 88, 500, 590, 590A1, 835, and 940 models.

## Overview

The NDZ Performance Safety Replacement Kit is a premium billet aluminum upgrade for Mossberg 12 and 20 gauge shotguns, designed to replace the factory plastic safety with a CNC-machined, ergonomically enhanced component. Featuring a complete kit with ball detent and steel plate, it offers superior durability, a perfect direct fit, and improved tactile control. Proudly made in the USA, this anodized or Cerakoted safety kit elevates both function and style for serious shooters.

## Description

desertcart.com : NDZ Performance Safety Replacement with Ball & Steel Plate for Mossberg 500 590 88 835 940 12/20 Anodized Aluminum - Black : Sports & Outdoors

Review: Easy install and great upgrade from factory control - Excellent upgrade for the plastic safety on a Mossy 500. Fit is perfect, and much easier to operate than the factory equipment. High quality, should last a lifetime. Easy install.
Review: VERY Nice replacement for original Safety ‘Switch’ - Anodize is good quality on Aluminum slide safety. You should use the original ball detent if you don’t LOSE IT! My slide was plastic, did not contrast the frame and I like the ‘thumb tab’ on this item. Form, fit and function ‘spot on!’ You can install it without full disassembly but it’s VERY ‘dicey!’ AS usual make sure it’s empty blah,blah,don’t be stupid, blah. Mine had a ONE WAY flat blade screw. You can force it out by applying HUGE arm pressure while turning (reverse) BUT YOU MUST have an EXACT FITTING [right width and length] and the edges MUST BE S-H-A-R-P to BITE into the “ramp” of the screw. You need a high quality blade like KLIEN etc. My screw is Hard Steel black oxide and was loctited. You need to push in at least twice as hard as you twist too! DO NOT REMOVE THE SCREW ENTIRELY or the part will fall into the frame! Unscrew just enough to be able to turn the slide sideways VERY SLOWLY as you need to “catch” the spring loaded detent BALL at the rear under the slide. Got to catch the spring too!!! REMOVE both the ball and spring WITHOUT removing the Slide yet. {Even knowing this I still pulled he screw all the way out and dropped the part myself. You can turn the gun upside down and shake it while using something to manipulate back into place.} HERE IS THE TRICK: Make sure you pull the Safety slide all the way back to “SAFE” and pull on the trigger with CONSTANT PRESSURE. You will ‘feel’ that the Safety Slide INNER PART becomes “held in place.” If you slide it forward, it becomes loose and you will drop it into the frame. Play with it to get a feel. Also some may require you to ‘cock’ the gun but of course make sure you are not stupid and it’s loaded blah, blah etc. PREPARE THE NEW STUFF and it would be smart to get a second person to help while you disassemble and re-assemble. Now that you got it held in place by trigger force, unscrew the original slide and have someone remove the Hardened Steel Dentent Plate that is under the Original slide. Have you helper put the Plate on the New Slide, place the screw in it and the Allen driver in the screw for you. Make sure the plate and new slide are oriented correctly to each other and the frame operation position. The “thumb tab” goes oward the Stock as well as the detent Plate. ALL WHILE STILL HOLDING THE TRIGGER start the screw into the INNER PART and tighten until it snugs down just a little with the SAFETY SLIDE “CROSS WAYS” on the frame so you can access the SPRING/BALL DETENT hole. Again this is a little exciting as you NOW LOOSEN the screw some, install the spring AND set the Detent Ball on top of the spring and then CAREFULLY ROTATE the Safety slide over top of the Spring/Ball Detent. You may need some fingernails to push Ball down some to get it under the Detent Plate. I can’t emphasize enough the delicacy of this procedure so as not to lose anything!!! Once you get it all in place, tighten it down and MAKE SURE IT OPERATES PROPERLY numerous times before loading it up. {I did this by myself as no one around and DROPPED THE DETENT BALL into the frame as the INNER PART moved forward while I was trying to get it under the Detent Plate. After a little tapping back & forth while upside down, it finally fell back out into my lap - whew!}

## Features

- The Safety Design Fits both 12 and 20 Mossberg Models: 88, 500, 590, 590A1, 835, & 940
- Our Billet Aluminum Safety replaces the factory plastic safety with an all aluminum part that has a CNC machined profile just like the factory part for a 100% direct fit.
- The main feature of our safety is the design which improves the ridges to help guide your finger naturally and securely than the stock component. This overall design is more comfortable to use, more secure, and more durable than the OEM plastic piece.
- Safety Kit Includes: Safety, Cap Screw, & Allen Key. Safety Kit with Ball Includes: Added Ball. Safety Kit with Ball & Steel Plate Includes: Added Ball & Steel Plate. IMPORTANT: If your OEM safety is plastic, you will need to reuse your stock safety plate or purchase a new one. If your OEM safety is steel, you must purchase a safety steel plate for installation.
- Manufactured to Exact Tolerances from 6061 T6 Aircraft Billet Aluminum & Hardcoat Anodized or Cerakoted for Extreme Durability; will not chip or break. NDZ Performance is a trusted brand Proudly Made In The USA, in our Facility.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09XF8P5CC |
| Best Sellers Rank | #31,285 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #70 in Hunting & Shooting Gun Stock Accessories |
| Brand Name | NDZ Performance |
| Color | Black |
| Country of Origin | United States |
| Customer Reviews | 4.7 4.7 out of 5 stars (340) |
| Date First Available | October 26, 2022 |
| Item Package Dimensions L x W x H | 6.1 x 3.62 x 0.47 inches |
| Manufacturer | NDZ Performance |
| Material | Aluminum |
| Package Weight | 0.01 Kilograms |
| Part Number | NDZ-MOS-ES-BB-P-BLK |
| Size | Enhanced Safety |
| Style | Safety Kit With Ball & Steel Plate |

## Images

![NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit - Image 1](https://m.media-amazon.com/images/I/51kgXQ9DPiL.jpg)
![NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit - Image 2](https://m.media-amazon.com/images/I/61Zzaz05yNL.jpg)
![NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit - Image 3](https://m.media-amazon.com/images/I/612YTYq0QVL.jpg)
![NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit - Image 4](https://m.media-amazon.com/images/I/518RvQRjXLL.jpg)
![NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit - Image 5](https://m.media-amazon.com/images/I/51JA28Os6hL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy install and great upgrade from factory control
*by R***H on February 15, 2026*

Excellent upgrade for the plastic safety on a Mossy 500. Fit is perfect, and much easier to operate than the factory equipment. High quality, should last a lifetime. Easy install.

### ⭐⭐⭐⭐⭐ VERY Nice replacement for original Safety ‘Switch’
*by B***H on January 4, 2025*

Anodize is good quality on Aluminum slide safety. You should use the original ball detent if you don’t LOSE IT! My slide was plastic, did not contrast the frame and I like the ‘thumb tab’ on this item. Form, fit and function ‘spot on!’ You can install it without full disassembly but it’s VERY ‘dicey!’ AS usual make sure it’s empty blah,blah,don’t be stupid, blah. Mine had a ONE WAY flat blade screw. You can force it out by applying HUGE arm pressure while turning (reverse) BUT YOU MUST have an EXACT FITTING [right width and length] and the edges MUST BE S-H-A-R-P to BITE into the “ramp” of the screw. You need a high quality blade like KLIEN etc. My screw is Hard Steel black oxide and was loctited. You need to push in at least twice as hard as you twist too! DO NOT REMOVE THE SCREW ENTIRELY or the part will fall into the frame! Unscrew just enough to be able to turn the slide sideways VERY SLOWLY as you need to “catch” the spring loaded detent BALL at the rear under the slide. Got to catch the spring too!!! REMOVE both the ball and spring WITHOUT removing the Slide yet. {Even knowing this I still pulled he screw all the way out and dropped the part myself. You can turn the gun upside down and shake it while using something to manipulate back into place.} HERE IS THE TRICK: Make sure you pull the Safety slide all the way back to “SAFE” and pull on the trigger with CONSTANT PRESSURE. You will ‘feel’ that the Safety Slide INNER PART becomes “held in place.” If you slide it forward, it becomes loose and you will drop it into the frame. Play with it to get a feel. Also some may require you to ‘cock’ the gun but of course make sure you are not stupid and it’s loaded blah, blah etc. PREPARE THE NEW STUFF and it would be smart to get a second person to help while you disassemble and re-assemble. Now that you got it held in place by trigger force, unscrew the original slide and have someone remove the Hardened Steel Dentent Plate that is under the Original slide. Have you helper put the Plate on the New Slide, place the screw in it and the Allen driver in the screw for you. Make sure the plate and new slide are oriented correctly to each other and the frame operation position. The “thumb tab” goes oward the Stock as well as the detent Plate. ALL WHILE STILL HOLDING THE TRIGGER start the screw into the INNER PART and tighten until it snugs down just a little with the SAFETY SLIDE “CROSS WAYS” on the frame so you can access the SPRING/BALL DETENT hole. Again this is a little exciting as you NOW LOOSEN the screw some, install the spring AND set the Detent Ball on top of the spring and then CAREFULLY ROTATE the Safety slide over top of the Spring/Ball Detent. You may need some fingernails to push Ball down some to get it under the Detent Plate. I can’t emphasize enough the delicacy of this procedure so as not to lose anything!!! Once you get it all in place, tighten it down and MAKE SURE IT OPERATES PROPERLY numerous times before loading it up. {I did this by myself as no one around and DROPPED THE DETENT BALL into the frame as the INNER PART moved forward while I was trying to get it under the Detent Plate. After a little tapping back & forth while upside down, it finally fell back out into my lap - whew!}

### ⭐⭐⭐⭐⭐ Easy install, works great and looks cool
*by N***K on February 19, 2026*

I ended up returning this one and ordering on the NDZ site because they only had the blue shell follower in stock, and the blue safety wasn’t in stock on Amazon. Still this was a great purchase for my 1987 mossberg 500. It took about 10 minutes to install and works flawlessly, much better than the original one. The follower is also great, they both feel much more solid and stronger than the original ones.

## Frequently Bought Together

- NDZ Performance Safety Replacement Kit for Mossberg 500 590 88 835 940 12/20 Aluminum - Ball & Steel Plate Complete Kit - Choose Color & Kit
- Magpul Industries MOE M-LOK fits Mossberg 590/590A1 Black Forend

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-17*