TANDEMKROSS Ruger Mark IV 22/45 Magazine Upgrade Bundle – MarkPRO Bumpers, Plus1 Followers, Green Springs & Follower Buttons

Upgrade Every Part of Your Ruger Mark IV 22/45 Magazines

This TANDEMKROSS magazine upgrade bundle improves capacity, feeding, loading, and reloads in one package. It combines four genuine TANDEMKROSS magazine upgrades so you can turn your factory Ruger Mark IV 22/45 magazines into competition-ready 11-round magazines.

It's a great fit for steel challenge and rimfire competitors, as well as anyone who wants smoother, more reliable magazines for range days.

What's Included

MarkPRO Extended Magazine Bumpers for Mark IV 22/45 (2-Pack)
Factory 22/45 base pads sit nearly flush, which makes it harder to seat magazines quickly. The MarkPRO bumpers add an oversized, textured surface so you can seat magazines firmly and strip them out easily during fast reloads.

Maximus Plus1 Followers (2-Pack)
Load 11 rounds into a standard 10-round magazine, ideal for rimfire competitions that allow an 11-round start. Made of durable Zytel in bright red, the follower also makes it easy to see when a magazine is empty. Works with MarkPRO bumpers.

Green Springs Magazine Springs
Shot-peened replacement springs designed for long service life and consistent feeding. A worn magazine spring is a common cause of feeding problems, and the dark green color makes upgraded springs easy to identify.

Magazine Follower Buttons (Brass 2-Pack)
Made from a non-galling brass material, these buttons create less friction than factory buttons for smoother loading and feeding. They're also an easy fix for lost or worn buttons. Also sold separately.

Key Benefits

• Increases capacity from 10 to 11 rounds per magazine
• Faster, more positive magazine seating and removal
• Smoother follower movement for easier loading
• Fresh springs for consistent feeding
• Drop-in installation with no gunsmithing or permanent modifications
• Saves you money compared to buying each part separately

Compatibility – Please Read Before Ordering

This bundle is designed for Ruger Mark IV 22/45 factory magazines. The included MarkPRO bumpers are the 22/45 version and will not fit standard (non-22/45) Mark IV magazines or Mark II and Mark III magazines.

The Maximus Plus1 Followers, Green Springs, and Follower Buttons also fit Ruger Mark II, Mark III, and Mark IV standard and 22/45 magazines if you want to use them in other Mark Series magazines. The follower buttons are not compatible with Mark I magazines.

Shipping Restrictions

IMPORTANT: Cannot ship to California, Colorado, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, or Washington. Do not purchase this item if you have a billing or shipping address associated with these locations.

Ruger®, Mark™, and 22/45™ are trademarks of Sturm, Ruger & Co., Inc. TANDEMKROSS and this seller are not affiliated with Ruger.