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The MP-18 SC is the split cavity middle child of Mizuno's 2017 MP-18 family. It sits between the full muscle back MB and the more forgiving MMC, and the SC in the name tells you exactly what it is: a compact players iron with a small cavity milled behind the hitting area. From address it looks almost identical to a blade. Thin topline, minimal offset, a short blade length that fills the space between your feet and the ball the way a low-handicap player wants.
Mizuno forged these from a single billet of 1025E mild carbon steel using its Grain Flow Forged HD process, and that matters more than it sounds. The soft carbon steel and the compact head give you the buttery, connected feel Mizuno built its reputation on. The split cavity relocates a little weight low and to the perimeter, so mishits toward the toe or heel hold their line better than they would off a true blade. You are not getting cavity-back help here. You are getting a blade that forgives one bad swing out of ten instead of punishing all ten.
Lofts run traditional. The 7-iron sits at 35 degrees and the set works down to a 47-degree pitching wedge, which is a full club or more weaker than the jacked-up lofts you find in game improvement irons. That keeps the gapping honest and the ball flight where a better player expects it, and it means these clubs are built to be flighted and worked, not launched high and hoped for.
In short
The Mizuno MP-18 SC (2017) is a compact blade for skilled ball-strikers who want feel and shot control. The set runs 3-iron to PW with a 35° 7-iron. It carries a $999 MSRP.
Refresh due soon
Brands in this category update about every 2 years, and the MP-18 SC is 9 years old with no successor yet, so a new model could land any time. Grab it at clearance pricing now, or wait a few weeks to see what replaces it.
Based on release timing and this line's typical refresh cycle, not a live price quote.
Modeled from the $999 original MSRP and a 9-year-old release (about 14% of MSRP retained used).
Used market value
$120 - $155
Private sale, fair to like-new
Trade-in value
$70 - $110
What a shop typically pays
Get an exact quote
Estimate only, from a depreciation model, not a live quote. Search “Mizuno MP-18 SC” on the sites above for the real number, which varies with condition, shaft, and demand.
| 3i | 4i | 5i | 6i | 7i | 8i | 9i | PW |
|---|---|---|---|---|---|---|---|
| 21.0° | 24.0° | 27.0° | 31.0° | 35.0° | 39.0° | 43.0° | 47.0° |
Stock steel shaft. Lofts are approximate and subject to manufacturing tolerances.
Typical carry by swing speed, adjusted for this set's actual lofts. Your numbers will vary with strike, shaft, and conditions.
| Club | Loft | Moderate swing~128y 7-iron | Average swing~143y 7-iron | Faster swing~157y 7-iron |
|---|---|---|---|---|
| 3-iron | 21° | 159 y | 178 y | 196 y |
| 4-iron | 24° | 151 y | 169 y | 186 y |
| 5-iron | 27° | 144 y | 161 y | 177 y |
| 6-iron | 31° | 136 y | 152 y | 167 y |
| 7-iron | 35° | 128 y | 143 y | 157 y |
| 8-iron | 39° | 119 y | 133 y | 146 y |
| 9-iron | 43° | 109 y | 122 y | 134 y |
| PW | 47° | 100 y | 112 y | 123 y |
Carry distances are modeled from TrackMan-based norms scaled to each club's loft, not measured for this exact model.
The split cavity is the whole story. Instead of the solid muscle bar of the MP-18 MB, the SC hollows out a section behind the top of the face and leaves a bar of steel low in the head. That pushes the center of gravity down slightly and adds a touch of stability without bloating the shape. The head stays compact, the topline stays thin, and the offset stays minimal, so nothing about the look gives away the extra help. Grain Flow Forged HD refers to a high-density forging that starts at the toe and pushes the grain structure through the head in one direction. Mizuno pairs that with 1025E boron steel and its copper underlay for a plated finish that holds up. The result feels dense and quiet at impact rather than clicky. Sole grind is moderate, the leading edge is clean through the turf, and the whole set is meant to be shaped with a good iron shaft rather than carrying the golfer on forgiveness alone.
The Mizuno MP-18 SC's 7-iron is lofted at 35° - traditional - aligned with classic iron loft standards. For a golfer with an 85-95 mph swing speed, this projects to a 7-iron carry of approximately 133-143 yards. The 5-iron (27°) to 7-iron gap of 8° is spread across a wide range, which may create overlapping distance windows with similarly lofted fairway woods or hybrids. The pitching wedge at 47° is traditionally lofted, pairing naturally with a standard 52° gap wedge.
SC stands for Split Cavity. Mizuno milled a small cavity into the back of the head instead of leaving the solid muscle bar you find on the MP-18 MB blade. It sits between the MB and the more forgiving MMC in the MP-18 lineup.
It plays like a blade with a cavity's small assist. The head is compact with a thin topline and minimal offset, so at address it reads as a players iron. The split cavity adds a bit of low and perimeter weighting, which steadies mishits without turning it into a game improvement club.
More forgiving than the MP-18 MB muscle back, but not by a huge margin. Toe and heel strikes hold their line a little better and drop less distance. If you regularly miss the center of the face, this is still not the iron for you. It rewards clean contact.
Traditional and honest. The 7-iron is 35 degrees, the pitching wedge is 47 degrees, and the set runs up through a 21-degree 3-iron. These are weaker lofts than game improvement irons, which keeps trajectory and gapping where a skilled player expects them.
It is Mizuno's forging process. Each head is Grain Flow Forged HD from 1025E mild carbon steel, so the grain structure runs continuously through the club for the soft, dense feel Mizuno is known for. The HD refers to a higher-density forge than earlier MP models used.
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