M3 GREASE GUN (STAMPED STEEL BODY w/ELECTRIC BLOWBACK)This is the enhanced and improved version of ARES's original M3A1, but this VERSION 2 is now in the original M3 guise. Remember to check out the special battery and magazine package below in the RELATED PRODUCTS section when you purchase this gun! The M3 was an American . 45 ACP submachine gun that entered U. S. Army service in 1942 and began to replace the Thompson series submachine guns. The M3 was designed from the outset as a more cost effective