The MP5A4 (fixed stock) and MP5A5 (sliding stock) models, which ended up launched in 1974, are available with four-position trigger groups. The pistol grips are straight, missing the contoured grip and thumb groove with the MP5A1, MP5A2, and MP5A3. The selector lever stops are marked with bullet pictograms as https://fidelo880pdr6.nico-wiki.com/user