Actually the pintle is the same for the .50 caliber and .30 caliber. It is listed in one manual as Pintle Tripod mount .30 caliber and in the .50 caliber manual as Pintle Tripod mount .50 caliber but both manuals list it as Federal stock number 1005-555-9332. You can't use the T&E interchangeably as they won't work due to the difference in the slot for the traverse bar. You could probably use the M2 tripod for the the M2 .50 caliber if you only shoot one round per day. I think even sitting without being fired the M2 tripod would barely hold the load. As was said the M3 tripod was barely good enough for the M2 gun and had to be anchored down with sand bags that barely did the job. I think the gun was supposed to be used more on a vehicle mount anyway.Sorry for asking a lot of questiosns, but is it possible to mount a m3 gun (.50 BMG) on a m2 (.30 cal) tripod with a modified pintle? Has anyone tried doing this and shooting? Is it stable? I assume the T&E device would not work, of course.