UST Mamiya Recoil Dart ESX Iron Shaft Review
By Russ Ryden, Fit2Score, A Dallas Fort Worth Club Fitter & Builder
The Highlands Performance Golf Center, Carrollton Texas
Golf Digest Certified America’s 100 Best Club Fitter
The UST Mamiya Recoil Dart ESX is my first iron shaft review in 2025. Review samples came from a major brand that offers them as a small upcharge. An option well worth the investment if you are considering carbon fiber shafts in your irons. It has been a long time since I looked at UST Recoils. I had a relationship with UST when they introduced the idea that hoop deformation added to club head speed. Unfortunately at about that time I began documenting hoop deformation and could not see much difference between the recoil and other carbon fiber shafts. And certainly not any similarity to steel shafts. That is no longer the case. As you will see below, the hoop deformation profile of the recoil is unique.
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Russ
The Mitsubishi MMT Model Golf Shaft is available for Hybrid, Iron, Wedge and Putter. This review will focus on the hybrid shafts. We have seen carbon fiber shafts with outer wraps of stainless steel wire, here we have a shaft with an inner wrap. The Metal mesh technology is only in the tip of the shaft. This is not the first time Mitsubishi has integrated metal into their shaft prepreg. I have fond memories of the TINI wire used in the KuroKage shafts. Mitsubishi tells us the metal mesh added weight without having to add material which would have change the balance of the shafts. And like the TINI wire, the mesh adds a responsive straighten to the shaft. 
