Just to clarify the situation with the Garand ammunition feed, the clip is not a stripper clip but an en bloc type (AKA charger clip) that is inserted into the rifle in its entirety. It's this clip that causes the 'ping' when the rifle runs empty as the clip is ejected (to throw it clear making way for a loaded clip to be inserted).
There were a handful of other rifles that made use of en bloc clips such as the German 1888 Commission Rifle and other Mannlicher rifles of the era.
The following pictures should better illustrate the situation.
en bloc clips for the M1 Garand
top of the M1 Garand
loading a Garand with an en bloc clip
