Yes, it simply not there because it is a relative newer name ... ( if you look, neither is the name Cattleman )
But the Pietta Frontier (either imported by Traditions or Cimarron or any other ) would be NCOWS OK.
The transfer bar is not a factor. Ruger Old & new Vaquero , the Beretta , Taurus Gaucho, and Colt Cowboy all have the transfer bar system.
Beretta's Stampede by Uberti was a Transfer bar gun and EEA imports a Transfer bar Gun.
Approved Cartridge Firearms
Revolvers, Reproductions
SAA 1873 Colt clones by EMF, Navy Arms, Cimarron, Uberti, Armi San Marco, EAA ,and Beretta.
Colt Bisley models distributed by EMF, Navy Arms, and Cimarron.
Colt 1873 Target models distributed by Navy Arms
Colt 1872 Open Top Models distributed by EMF, Cimarron, and Navy Arms.
Conversion Models distributed by Cimarron, Navy Arms, & others.
Ruger Full-size Vaquero and new Ruger Vaquero
Remington 1875 and 1890 SA manufactured by Armi San Marco, Beretta, & Uberti.
Schofield revolvers made by Uberti, Armi San Marco, and Smith & Wesson.
Conversion cylinders by Kirst and R&D
Taurus Gaucho, and Colt Cowboy
Colt models 1889, 1892,1894,1895,1896,1901,1903, and Colt New Police
Webley revolvers with Birds-head or Banana grips eg. (MK1, MK2, MK4, MK5)
Model 3 Russian by Uberti, Navy Arms
Beretta Laramie by Uberti, Beretta
455 Webley Service Revolvers: Mark I, Mark II, Mark III, Mark IV, and Mark V. (Model VI is not
approved.)
Other Webley Revovlers: R.I.C. (Royal Irish Constabulary), M.P.(Metropolitan Police), #1 1/2, #2, #4
(Webley-Pryse),#5 Express, Mark II Pocket, Improved Government (Patterns I, II, and III), Webley
Government (including W.G., W.G. Army, and W.G. Target)
Other British Revolvers: any pre-1900 design by makers such as Adams, Kerr, Tranter, Enfield Mark I
& II .455/.476 service revolver
Rogers & Spencer, and reproductions, and conversions of same