KxK Guitars is a custom guitar shop founded in 1997 in San Diego County, California by luthier Rob Kaufman. The KxK name stands for Kaufman Electric Guitars And Kaufman Acoustic Guitars, reflecting Kaufman's role as the sole builder behind every instrument. The shop is known for handcrafted, neck-through-body electric guitars, with V-shaped models, Warriors, and seven-string designs forming a recurring part of the catalog.

The shop has built a following in the heavy metal and extended-range guitar communities, with players citing the thin neck profiles, build quality, and one-off custom appointments as draws. KxK has produced a signature V model for K.K. Downing of Judas Priest and KK's Priest, and other players associated with the brand include Karl Sanders of Nile, Laura Christine, and Steve Swanson.

KXK has 3 products cataloged on Equipboard, including Solid Body Electric Guitars and Extended Range Guitars. Their gear is featured by 2 artists, with the strongest followings in Rock, Electronic, and Metal. Notable users include Karl Sanders and K. K. Downing.