* ATTENTION * If you already own our Universal Cartridge Adapter and would like to modify and reuse it with the Mini-Pro Lifter, please choose the Lifter Only option. For new users or those that don't want to modify their original adapter, please choose the Mini-Pro System kit, which includes a modified adapter.
The Mini-Pro Lifter and Cartridge Arrestor System is the next step in the evolution of short-cartridge cycling capability. Taking the success of our Universal Cartridge Adapter and 590S Cartridge Arrestor Upgrade Kits to the next-level, Mini-Pro is not an adapter; it is an OEM-like solution that addresses the heart of the shotgun's functionality, where the entire factory lifter/elevator is replaced with our Mini-Pro Lifter and 590S Cartridge Arrestor System. This means you can essentially upgrade most Mossberg pump-action 12-Gauge shotguns with a 3" receiver to a true 590S-like configuration (not compatible with 590R).
The Mini-Pro Lifter is constructed of hardened steel and blackened to match the factory finish. The cam profile has been optimized to accommodate minishells, and the bolt carrier rails have been polished to smooth out the action and provide a "broken-in" feel. The legs of the lifter are slightly biased in the open position to ensure plenty of residual pressure is applied to the pivot pins so they can't jump out of their respective holes if the firearm is dropped (see this video starting at minute marker 4:25 for more info: https://youtu.be/87XSOnQrCYg).
The Cartridge Arrestor is exactly the same as our 590S upgrade design and is constructed from vulcanized thermoplastic rubber. The follower is machined from solid 6061-T6 billet aluminum and is finished in a hard, safety-red anodized coating.
This system is compatible with any Mossberg 500, 590 or Maverick 88 pump-action 12-Gauge firearm with machined grooves in the receiver. Please refer to the picture or the installation video below to confirm your firearm's compatibility, but we've never seen a Mossberg pump-action firearm without these grooves.
*Please note our Universal Cartridge Adapter is forward-compatible with the Mini-Pro System with a simple modification. If you already own the Universal Cartridge Adapter and would like to reuse it, you will only need to purchase the Mini-Pro Lifter. See video for more details.
**Apply a thin coating of gun oil to all lifter surfaces prior to installation.
***The Mini-Pro Lifter, Cartridge Arrestor and Magazine Follower are optimized to function as a system, however the factory and other aftermarket followers may function as well for those that do not wish to use the follower provided.
****A short break-in period is recommended for the Mini-Pro Cartridge Arrestor, cycle 4-5 magazines of 2-3/4" cartridges thru the firearm before trying to feed 1-3/4" or 3" cartridges (can be dry-cycled if you have a safe place).
Great kit!! Worked perfectly right out of the box and install was easy
The order process was straightforward. My order was processed, and shipped in a timely manner. Communications from Defender Tactical were excellent. The initial quality of the product is 5 star. I installed the system myself in a Maverick 88. Everything fit well, and feels good. I have not had a chance to test it, so I would like to be able to update this review once I complete the testing.
My sample of one. My new maverick 88, install was easy, but the lifter was to tight and would not cycle, got replacement and new lifter was better. Tried cycling fully load tube. Had mostly jams, had to take apart to free it up, did second fully loaded tube and had same issue. Requesting refund to I can buy just the adapter with no lifter. I think that will solve my problem. The oem lifter cycles with no binding or jams with 2 3/4 shells. Customer service was great with fast replacement, just not sure it works with my maverick 88.
Hi Joseph, sorry you had problems with your lifter, we received the first lifter back today and tested it in our Mav 88, and it seems to work fine. We tested it in our Shockwave too and no problems there either. So not sure what's going on...
But no problem returning the kit and replacing it with our cartridge adapter. We'll be in contact to take care of this for you.
Ordered 2 Pro Lifter kits both work fine in the 2 Mossbergs I have them in(500AT and 590) but neither kit would work in a 500A I had. The sled on the bolt would not allow the elevator to move when attempting to cycle it, and the gun would lock up. I contacted Defender Tactical about having an issue, I was vague in the message about the issue but they did respond back asking for more information. I did not reply because I wanted to make sure it wasnt an issue with my 500A. This past weekend I picked up a well loved 500AT and a 590. Both function exactly as they should with the kit installed. I looked over the sleds and bolts on all 3 and it almost looks as if the groves on the 500A sled are not milled the same as the other 2. Just a heads up if you are having an issue it may be the gun and not the Pro Lifter.
⭐⭐⭐⭐⭐ Awesome Product, Even More Awesome Support!
**Pros:** Easy installation, flawless performance after break-in, world-class customer service.
**Cons:** None (initial minor issue was resolved instantly).
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🛠️ The Experience
Initially, I ran into a small snag with the lifter sticking right out of the box. Mechanical parts can sometimes have minor hiccups, but what really matters is how a company handles it—and this team blew me away.
🤝 Top-Tier Customer Service
I reached out to customer support via email and was contacted by **Wesley**. He was incredibly responsive, professional, and didn't make me jump through hoops. Instead, he diagnosed the issue and sent out a replacement right away without any hesitation.
🚀 Performance Update: Smooth as Butter!
* **Easy Install:** Putting the new part in was an absolute breeze.
* **Break-In Period:** After a quick and expected break-in period, it has worked perfectly.
* **Current Status:** It is now running **smooth as butter**!
**The Verdict:** A great product is only as good as the company behind it. Thanks to Wesley's fast action, I am a thoroughly impressed and loyal customer. Highly recommended!
