To be more precise, M. MacIntosh reference to Parker 1/2 frames is in "Best Guns". Several articles in the DGJ have contributed to the 1/2 frame saga. Ed Muderlak devotes a full opinionated chapter (Chapter 12) of his book("Parker Guns", Safari Press) to Parker frames. He believes that the 1/2 frame came as a result of Remington´s need to lower costs. A lighter frame would have saved them from men hours spent in the finishing process (Chapter 15). He is right in pointing out that Parker never advertised frame sizes as an option.
There is a table of frame dimensions in a Charles Price article in the DGJ and also in the book "Parker Gun: Identification and Serialization" (p. 45), C. Price & S. Pjestad.
