Mastroserio is credited on various features on both pencils and ink for ACG by Jerry Bails' Who's Who. The art here is probably his, as it resembles his credited pencils/ink story in Operation Peril #10, "Notorious Western Outlaws". The horses are identical, and some faces in profile with the special wavy hair in the neck. Also the rather inaccurate dog is identical to his dogs in a signed story in Adventures into Darkness #10. But he seems to vary in his inking, with more black in some horror stories. Another possible penciler could be Mo Marcus, who pencilled many signed stories inked by Mastroserio, but he is only credited on funny animals for ACG.
Moritz is credited on various titles for AVG by Jerry Bails' Who's Who, and his drawing of the lines inside the ears in sideview are so unique that he can hardly be mistaken, page 5. He has many stories credited in Adventures into the Unknown.
Faces and especially his rendering of the lines inside the ear in sideview points this to Moritz, and the faces too are his. He is credited on various features for ACG by Jerry Bails' Who's Who.
Originally credited "Lee Elias ?", but it is the artist that made most of the Bantam stories, Leonard Starr. He is the only one credited on Bantam Buckaroo by Jerry Bails' Who's Who. The artwork match his signed story in Blazing West #18, faces, hats and the hands with gloves. Elias has more rounded faces and lips, much like Milton Caniff or Frank Robbins.
With few ears to pinpoint him here, the inklines on the face of the Indian on page 2 is identical to the face in panel 4 in the story "Pistol-Packin' Judge" in this issue, and on that page is found the unique ears of Moritz. He is credited to various features for ACG by Jerry Bails' Who's Who.