The most commonly issued weapon is the M16 - typically, the M16A2, M16A4, or now, M16A5.
Yes, the United States Marine Corps (USMC) has used Smith & Wesson firearms. One notable example is the Smith & Wesson M&P (Military and Police) pistol, which has been used by some units within the Marine Corps. Additionally, Smith & Wesson revolvers have been issued to some Marine Corps personnel in the past.
Machine Gun Corps was created in 1915.
Machine Gun Corps ended in 1922.
Canadian Machine Gun Corps was created in 1919.
Machine Gun Corps Memorial was created in 1925.
During the Vietnam War, the US Army/Marine Corps M48 Patton medium gun tanks fired 90mm cannons, and the M551 Sheridan light tanks (officially designated the Armored Airborne Reconnaissance Assault Vehicle) fired a 152mm cannon. The M41 Walker Bulldog light tank fired a 76mm main gun.
gun +human
The Vickers machine gun was the primary machine gun they used in WWI.
Gun powder was the main active ingredient.
M-1 Garand
The 5th and 6th Marine Regiments and the 6th Machine Gun Battalion became the 4th Marine Brigade with a troop strength of 9,444 men. They were combined with the 2nd Engineer Regiment (US Army) and 3rd Brigade, US Army to form the 2nd Division (Army), American Expeditionary Force. The Second Division was under the command of two different Marine Corps Generals at different times during WWI, Brigadier General Charles A. Doyen and Major General John A. Lejeune.
A person can buy a used Beretta 84 gun frame through websites like Gunbroker or at local gun shops. The frame is the main component of the gun where other parts are attached.