The M1 Garand, the M1917 Springiled rifle, and the M1 carbine. [Note: that is incorrect. These were the weapons used in WW2, not WW1]
You can not, there are no conversion kits from an m14 model to an M1
The marines used many gun models throughout the war. However, the primary weapon of US forces was the M-1 Garand. The M1 Carbine and M14 were also frequently used rifles.
US military for model #1.
In Vietnam the Marines, like the Army, used what they were issued. Although there were times in which some of the men appropriated (got a hold of) civilian shotguns, revolvers, and some WWII Tommy Guns (.45 caliber Thompson Submachine guns) and even some WWII M1 Carbines and M1 Garands. US Marines were also the last US military personnel to be issued fighting knives in the Vietnam War...the infamous KABAR.
If you are referring to the Rifle, US .30 caliber M1, M is the designation for Model. 1, since is was the first model of semiautomatic rifle issued by the US military. See the link at the bottom of the page for additional information.
your M1 garand was made in 1945
marines use FPO-AP's
Why, hell yes! We seagoing Marines are MARINES!
Towards the end of the '50's, the Army amd marines started getting rid of m1s and replacing them with m14's.
NO, Valkries are for the Imperial guard. Space Marines use Thunderhawk Gunships.
Google Numrich Arms. They have many parts.