Logo taken from detail of New Detective Magazine

I haven't given credit for This Gun in My Hand's logo. That's a modified detail from the cover of New Detective magazine, Vol. 8, No. 4 (July 1946), which you can read or download from archive.org. I haven't read any stories from it yet, but Fredric Brown is top notch. I've read his novel Night of the Jabberwock and some of his weird sci-fi shorts. Below are the logo and the full cover image: