While speaking to William Wainwright and Sue about the shell casing from Wainwright's rifle, Magnum indicates that there are marks on the casing from a stripper clip, thus identifying the rifle as an M1 [Garand]. The M1 rifle is not loaded with stripper clips, it utilizes en bloc clips which are themselves loaded into the rifle's receiver magazine, and stripper clips do not leave marks on shell casings anyway.