FUN: To Hell With the NFA: The Full Auto Crosman M1 Carbine Air Gun. “We don’t typically talk a whole lot about airguns at Shooting News Weekly, but this is one I had to mention. For Father’s Day this year, my wife and kids snagged me a Crosman CFAM1, also known as a Crosman M1 carbine imitation that shoots standard 4.5mm BBs. Best yet is that it’s a select-fire BB gun. I didn’t know much about airguns, and I certainly didn’t know they make them in full-auto configurations.”