Cobra Limited Edition King RF Proto Irons Review

By Kellie Noszka

Rickie Fowler hits a golf shot

It took hours of collaboration with one of the world’s top golfers and 33 different revisions for the Cobra RF Proto irons to reach a level of near perfection. The planning paid off as the premium irons hit the mark for overall look, feel and design.

The Idea Behind the RF Proto Irons

Rickie Fowler has been a Cobra-Puma ambassador since turning pro in 2009 and helped design the special irons which were released to the public in January 2021. Fowler uses a customized version of the irons which are stamped with a “rev33” mark, a reference to the 33 revisions it took to get to the final product.

The irons have a unique copper finish, one of Fowler’s personal choices and finishing touches on the design.

The Technology Behind the RF Proto Irons

Cobra uses a two-step process to create the RF irons. Each club is twice forged from soft carbon and milled for 155 minutes, a process that helps develop the precise lines and angles for optimal performance.

The Tour-caliber irons have sharp edges with little to no offset and a thin topline. It is a design that Fowler prefers and personally developed in each iron.

Tungsten Weighting

The irons have a special high-density tungsten weight in the toe of the clubhead that puts the center of gravity right in the center of the face. The positioning allows for a smooth feel and some forgiveness on off-center shots.

Golfers who have reviewed the clubs give high marks for overall forgiveness and feel, even on mishits.

Shaft and Grip

The Cobra RF Proto irons come standard with KBS C-Taper shafts and Golf Pride Tour Align grips. The shafts are developed for competitive golfers who prefer a low trajectory and piercing flight. Each shaft is fairly stiff and creates a low level of spin. The grips have a nice feel enjoyed by any level of golfer.

Specifications (In Degrees)

Head 4 5 6 7 8 9 PW
Loft 24° 27° 30° 34° 38° 42° 46°
Lie 61° 61.5° 62° 62.5° 63° 63.5° 64°
Length 38.75” 38.25” 37.75” 37.25” 36.75” 36.25” 36”

Special Packaging

These limited-edition irons are more than superior clubs, they are also collector’s items. Each set of irons comes packaged in a commemorative black box with a card of authenticity that is signed by Fowler himself.

A set of 4-PW irons retails for $2,499.

Image: Sam Greenwood/Getty Images Sport via Getty Images

About the Author

Kellie Noszka is a freelance writer and former sports reporter for the Cincinnati Post. She was a golf caddie for 10 years and earned an Evans Scholarship to The Ohio State University. Kellie developed a deep appreciation for the game of golf at an early age.