Proto Concept C03TC Irons: Specs, Price and Design Details

Proto Concept has released the C03TC, a cavity-back iron the boutique maker positions between a traditional blade and a modern players’-distance iron, aimed at mid-to-low handicap players.

What technology is in the C03TC?

Proto Concept used 3D CAD design to optimize the center of gravity for each individual loft in the set. The clearest expression of that is a CNC-milled undercut cavity built into the 4- through 7-irons, machined to a different depth, width and angle for each club to lower the center of gravity and help longer irons launch. The shorter scoring irons omit the undercut entirely, favoring a flatter, more controlled flight instead. The full set is forged in Japan from S20C carbon steel as a single-piece construction, with a nickel-chrome plated face.

How does it compare to other players’ irons?

At 32 degrees, the C03TC’s 7-iron sits between traditional blades, typically around 34 degrees, and stronger-lofted players’-distance irons that can dip below 30 degrees. The head carries more visible offset than its 3.9mm of face progression alone would suggest, a look that a number of tour professionals — including Adam Scott, Cameron Young and Bernhard Langer — have sought out in their own iron profiles to manage strike and start lines, even though offset is more commonly associated with game-improvement designs.

Reviewers have described the feel off the face as soft with a dense, forged sensation comparable to established players’ irons, and found the sole’s wide, low-bounce grind playable through the turf despite minimal bounce.