Mizuno are expanding Pro Series irons with the launch of new M-13 and M-15 models for 2026 as successors to the current Pro 243 and Pro 245.
The Mizuno Pro series saw two new arrivals in 2025 when the S-1 irons and S-3 irons were launched and there are two new arrivals for 2026 after the M-13 and M-15 were added to the USGA Conforming List.
The M‑13 is positioned as the more traditional, compact forged player’s cavity blade model and replaces the Mizuno 243 in the Pro lineup.
The M‑15 is the more forgiving hollow‑body hot players iron that appeals to a wider range of golfers and takes over the role of the Mizuno Pro 245 with more speed and launch help.
Pros & Cons
✅ Progressive designs through the set with three separate constructions
✅ Exceptional forged feedback in short irons
✅ Consistent distance control and subtle forgiveness from both models
✅ Impressive ball speed and launch from hollow long and mid irons
❌ M-13 demands precise strikes for max speed and they are less explosive than hollow rivals
❌ M-15 has a slightly firmer feel than full blades
❌ Short-iron spin may underwhelm high-speed players
Mizuno Pro M-13 Irons Specs & Design
The new Mizuno M‑13 is built for consistent distance gapping and classic forged feel with more forgiveness and ball speed added compared to the Pro 243 – without losing the player’s profile.
The Pro M‑13 uses a multi‑construction design of pocket‑cavity long irons, thinner‑walled mid‑irons that are 35% thinner than the 243 and one‑piece forged short irons to tune launch, speed and feel through the bag.
The long irons (4-iron to 5-iron) feature a full pocket cavity plus a Contour Ellipse variable‑thickness face, while the mid irons (6–8) use a thin‑wall forged construction.
The Contour Ellipse Face technology features an elliptical pattern from heel to toe than generated enhanced flex and ball speed without hot-face excess in the design.
In the 9-iron, pitching wedge and Gap Wedge, Mizuno move the design to a one‑piece Grain Flow Forged S25CM mild‑steel body for maximum feel.
The short irons focus on precision and feedback with higher bounce and more traditional lofts that suit better players who like to control spin and trajectory.
The irons feature Mizuno’s Harmonic Impact Technology, which combines a copper underlay and full cavity ABS badge for fine-tuned vibration patterns.
Also part of the design is the Triple Cut Sole, which has sharper leading edges and bevelled trailing relief, ensuring dependable turf interaction from every lie.
Finished with a Nickel Chrome Satin Brush finish, the M-13 irons are available in 4-iron (22 degrees) to Gap Wedge (48 degrees).
Mizuno Pro M-15 Irons Specs & Design
The M‑15 replaces the Pro 245 irons and Mizuno have focused on higher launch and more stability through the back of this new model.
The M‑15 irons have a progressive hollow‑body design with a Grain Flow Forged Chromoly face and stainless body in the 4-iron to 8-iron.
The long irons have a Contoured Ellipse Face style design with a multi‑thickness face and internal tungsten weighting for ball speed and stability.
Contour Ellipse Face technology works via an elliptical pattern from heel to toe and the result is more face flex and ball speeds than in previous generations.
In the 9‑iron, pitching wedge and gap wedge the head shifts to a partial hollow 1025E Grain Flow Forged body with a stainless back, raising CG for lower, more controllable launch in the scoring clubs.
The M-15 also features refined sole design with added bounce compared to the Pro 245 to encourage a cleaner entry and smoother exit through the turf.
Mizuno’s Harmonic Impact Technology and copper underlay add to the feel of the irons, which are finished in Premium Nickel Chrome Satin.
The M-15 irons are available in 4-iron (20 degrees) to Gap Wedge (48 degrees).
Mizuno M-13 & M-15 Irons Review: Are they any good?
Mizuno have really pushed the boat out when it comes to progressive construction designs with everything from pocket-cavity long irons with ultra-thin Chromoly faces to pure forged short irons.
The Pro M-13 irons have a traditional players’ look for precision and subtle speed enhancements, making them an ideal upgrade for low-handicap golfers who prioritize feedback and workability.
The M-15 irons, meanwhile, push the envelope for better-player hollow irons, offering explosive ball speeds and high launch from the long irons thanks to full hollow bodies
FAQs
What is the 2026 Mizuno Pro irons release date?
The new irons were released in January 2026, joining the previously released Pro S-1 and Pro S-3.
How much do Mizuno Pro M-13 and M-15 irons cost?
The irons retail at around $250 per club.
What are the Mizuno Pro Series M-13 and M-15 specs?
The M-13 irons are available in 4-iron (22 degrees) to Gap Wedge (48 degrees), while the the M-15 irons are available in 4-iron (20 degrees) to Gap Wedge (48 degrees).
James is an avid golfer and reviews golf equipment and new gear for GolfReviewsGuide.com as well as providing the latest golf news. You will find him on a golf course wherever possible.
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