Check out the photos we shot of a prototype Callaway driver with a sliding weight track that wraps around the perimeter of the driver head.

The weight appears smaller than the one in TaylorMade’s SLDR driver, but its rearward positioning is sure to stir healthy (and unhealthy) debate about the best place to position the center of gravity in a driver head.

For years, TaylorMade has been touting the benefits of a low-and-forward CG for a higher launch and lower spin with its drivers. Company officials say that the CG positioning increases ball speed and forgiveness on shots hit low on the face.

Companies like Titleist, Callaway and Ping have preferred more rearward weighting strategies, which according to Ping’s Marty Jertson, a senior design engineer for the company, improves clubhead stability and allows golfers to achieve more efficient launch conditions (a.k.a. a lower spin loft).

The driver also includes a removable weight at the end of the weight track on the heel portion of the driver and a dual-cog adjustable hosel, but don’t count on this driver coming to retail exactly as is — Callaway officials declined comment on the unfinished prototype, which doesn’t have scoring lines on the face or markings on the sole.

We also spotted two prototype Callaway forged irons on the range at the Deutsche Bank Championshp. One of the irons looks to be in line with Callaway’s 2013 X Forged iron model, but unlike the X Forged it has a multi-material construction that we can only assume adds to the iron’s forgiveness and functionality.

The other model has a deep undercut cavity, which makes an iron higher launching, more forgiving and generally provides faster ball speeds.

Check out more photos of the driver and irons below, and make sure to click here to see what members are saying about the prototype clubs in the forums.

Click here to see the buzz about the prototype Callaway driver and irons in the forums.