Mizuno expands its Pro lineup with the M-13 and M-15 irons, pairing traditional forging with added speed, launch and forgiveness.
Gear: Mizuno Pro M-13, Mizuno Pro M-15 irons
Price: $215 per club
Specs: Grain Flow Forged irons featuring multi-material construction, Contoured Ellipse Face and Micro-Slot technologies, tungsten weighting (M-15), Harmonic Impact Technology, and Triple Cut Sole design
Available: Jan. 5, 2026
Who it’s for: Better players who want the look and feel of a Mizuno Pro iron but are open to modern construction that adds speed, elevates the launch angle, and boosts forgiveness without compromising control in the scoring clubs.
What you should know: The Mizuno Pro Modern Series expands the Mizuno Pro lineup with two irons that blend traditional forging with modern materials and construction. The M-13 is for players who prioritize control with added speed in the long irons, while the M-15 offers higher launch and more forgiveness through a more in a hollow-body design.
The Deep Dive: There’s always been a clear identity attached to Mizuno Pro irons. Compact shapes, soft feel and precision were emphasized more than chasing raw distance. If you were chasing yards, the JPX series offered more ball speed, while the Mizuno Pro family, like the MP clubs before them, was for golfers with repeatable, powerful swings who wanted classic irons.
But golf is not stagnant, and the modern game is ever-changing, so Mizuno is introducing a new line — the Modern Series — to sit beside the Mizuno Pro family. To be clear, the Mizuno Pro M-13 and Mizuno Pro M-15 irons are not replacing the S-1 or S-3 irons, and Mizuno isn’t abandoning its identity. It is showing the Japanese brand wants to give accomplished players more choices.
When they put either the M-13 or the M-15 behind the ball, discerning golfers will see the narrow topline, short blade length and minimal offset that they have come to expect from Mizuno blades. But standing over the ball, they won’t see some technologies that should enhance performance.
Designed as the successor to the Mizuno Pro 243, the M-13 4- and 5-irons feature a pocket-cavity design with a Grain Flow Forged Chromoly 4120 face, neck and topline. A 431 stainless steel piece is added to the back. A variable-thickness Contoured Ellipse Face is just 1.37 millimeters thick, and it helps generate more ball speed and distance in the long irons while maintaining responsiveness.
The 6-, 7-, and 8-irons are designed the same way, but the faces are 0.3 millimeters thinner, and these mid-irons also feature a Micro-Slot Grain Flow Forged construction that increases face flex without adding excessive spin. In the 9-iron through gap wedge, the M-13 transitions to a one-piece Grain Flow Forged 1025 Elite steel construction, prioritizing precision, distance control and a soft impact feel.
The M-15 has been made to provide a more forgiving approach while staying firmly within the Mizuno Pro family. Designed as the successor to the Pro 245, it uses a hollow-body construction through much of the set, paired with a variable-thickness face to promote consistent ball speed and higher launch. In the long and mid irons (4-8), more than 50 grams of tungsten weight has been strategically positioned low in the head to increase stability and help produce higher-flying, more playable shots.
In the short irons (9-GW), the M-15 shifts to a partial hollow-body construction built from Grain Flow Forged 1025E steel, placing a greater emphasis on control and workability as golfers move closer to the green. That transition helps preserve feel and precision without giving up the forgiveness benefits that define the rest of the set.
Both irons feature Mizuno’s Harmonic Impact Technology, a process that uses computers to study the sounds and vibrations created at impact. It allows designers to reinforce specific areas in the head, typically in the topline, and along with a copper underlay produce the most pleasing impact sound.
Finally, the Triple Cut Sole, with its beveled leading and trailing edges, is designed to promote cleaner turf interaction and consistent contact from a variety of lies.
Together, the M-13 and M-15 give golfers a clearer way to choose how much help they want in a Mizuno Pro iron. The Modern Series allows good ballstrikers to match head design to their game while maintaining the forged feel and compact shaping that have always set Mizuno apart.
This article originally appeared on Golfweek: Mizuno Pro M-13, M-15 Modern Pro line better player irons 2026
Category: General Sports
