The TANDEMKROSS Maximus plus 1 follower is an essential enhancement for the Ruger Mark series, tailored for competitive rimfire shooting. This drop-in upgrade is compatible with Ruger Mark IV, Mark III, Mark II and 22/45 models, transforming your firearm into a competition-ready tool. The Maximus plus 1 follower enables the loading of 11-round in a standard 10-round magazine, which is advantageous for rimfire competitions permitting an 11-round start. Constructed from robust Zytel and featuring a bright red color, it enhances safety by clearly indicating when the magazine is empty. Installation is straightforward, requiring no special tools. The Maximus plus 1 follower is available in two-packs and is compatible with both the factory magazine base pad and the TANDEMKROSS MarkPRO magazine bumper for Ruger Mark IV and Mark IV 22/45. Additionally, it functions seamlessly with extended magazine bumpers for Ruger Mark III and Mark III 22/45. Optimize your competitive edge by increasing your magazine capacity with the TANDEMKROSS Maximus plus 1 follower for the Ruger Mark series.

The capacity of your Ruger MK and MK 22/45 magazines by adding one additional round
The red indicator is displayed when the magazine is empty, enhancing safety by providing a clear visual alert to prevent operational errors
Constructed using zytel material, this product ensures exceptional durability and longevity, making it ideal for demanding applications

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It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

It is the customer’s responsibility for understanding state laws regarding magazine capacities. Palmetto State Armory abides by all state regulations regarding the sale of high capacity magazines. We DO NOT ship high-capacity magazines with firearms to certain states. We WILL NOT replace high capacity magazines with state compliant magazines. We DO NOT offer refunds in place of the magazines. Please see our terms and conditions for a list or restricted states.