Need a few extra rounds for your next IPSC comp? Look no further than the Stoeger 3Mk Extension Kit.

Designed and manufactured by our expert gunsmithing team at Ignition Custom Engineering, this kit will replace your factory magazine and increase mag capacity by +2, +3 or +5 additional rounds.

Easy changeover of the extension piece to adjust your capacity and no permanent modifications are required. Just pull the factory tube out, insert our durable two-piece design and you're ready to go. 

All instructions are provided (requires disassembly of shotgun, unscrewing and removal of factory magazine tube. Insert pre-cut main tube, reassemble and attach extension piece. Secure with included barrel clamp). 

Australian made by the gunsmiths at our specialist South Australian workshop.

Kit Includes:


Which Kit Is Best For Me?

Shorter barrels or hunting set ups - we recommend using the +2 kit. this will give you two extra rounds without adding on too much front weight and ensuring agility during movement.

Longer shotguns / competition / where weight isnt an issue: +3 kit (3 extra rounds) or +5 Kit (for five extra rounds) are ideal for competition. (itt will be a little heavier at the front when fully loaded). This is the most popular for IPSC competitors.

Both: Combo Kit which has two different extension pieces so you can swap according to what you need on the day!


You are responsible for ensuring this item complies with your local state or territory laws and regulations, and comply with any registration or notification requirements before purchase. We do not accept returns on this item for change of mind or non compliance with regulations. You may be asked to provide a copy of your fireams license before this item is shipped.


Brand Ignition Custom Engineering
Shipping Weight 0.4990kg

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