The Roundup features a knotted pine top, adjustable Melita bridge, and a pair of single coil DeArmond pickups, to go alongside a host of Western themed aesthetic touches. The Roundup is very similar to the original 6121 Chet Atkins produced at the same time, but the 6121 features a maple top and a non-adjustable bridge.

While most Roundups were produced with single coils, limited models were released in the late '50s that featured period-correct Filter'tron humbuckers.