My newest C&R arrived yesterday. I love getting a machine gun delivered to my house. I purchased it last Nov and it was early Jan before I sent out all the paperwork to ATF.
It's an early Guidelamp M3 Grease Gun. They started production in May of 43. With 85,130 weapons made in 43, that would average almost 11,000 a month. I'm sure production started slow and ramped up, but the serial number is less than 6000, so I think it could have been produced in the first month or early in the second. The rear sight is the early model.
I purchased it from a movie rental company. The M3A1 barrel that's on it is threaded internally for a blank firing adapter. The company could not tell me what movies it was used in. I've started a FOIA search to see if I can get any other info.
Being that it's mostly stamp steel, it's heavier than I thought it would be. I'm going to field strip it today and make sure everything looks good. I hope to take it out next week to shoot it.