I have aspirations one day of building an M24A3 gun mount for my M. Probably just the mount and M23cradle, as even a non-firing M2HB costs more than a few good M37s......but knowing that I want to install a mount I started looking around for pieces and found a good source for cheap NOS feed trays for the 30 and 50 cal MGs (if interested let me know and I'll tell you where to get them). My problem is I don't understand what the two piece spring loaded arm thingy is supposed to do (see pic below). Only thing I can guess is it squashes the ammo belt down to keep it from rattling itself out of the can????? I looked on Google, but to no avail, but didn't see any of the other types of ammo box trays with such an arm thingy. So I have no idea.....can someone enlighten me please????
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