The first pressing only has a green inner sleeve with "KISS" written on it in "blood".
Inserts: (1st pressing only) The infamous "Love Gun". It was a cardboard gun that would make a popping noise when opened. It came on a single thin cardboard sheet, perforated for removal. The "gun" is worth more if it is unassembled. There was also a merchandise order form in Love Gun.
(Taken from the book: "KISS Collectibles Identification & Price Guide" - 1993, Karen & John Lesniewski)
"Love Gun", released may 1977
Mexico, first press Gamma
USA promotional copy with asambled gun and inserts