Crossroads - S1-E5
Trivia: In the scene where the Red Devils toast the 101st Airborne, when the camera shows the assembled soldiers you'll see Tom Hanks as one of the Red Devils in a beret at the back left (5 or 6 men in) with his right hand on his hip. His head moves forwards to become obscured behind another soldier. (00:30:30)
Answer: That actually is the clip. It is loaded into the top of the rifle, and is ejected with the last round. See http://www.wwiitech.net/main/usa/weapons/m1/.
J I Cohen