Medal Of Honor: Breakthrough features 27 weapons in total, each and every one effective and of some use in certain parts of the game.
Colt 45 (Allied)
The Colt 45 had to undergo some modifications before it was accepted by the US Army, but after that it was the most reliable pistol they used during the war and instantly became the weapon of choice for many U.S. troops. Regardless of a law that stated infantry were forbidden to use the Colt 45, it was never enforced, and many men still carried the Colt. The weapon carries seven rounds in each clip.
Walther P38 (Axis)
Webley Revolver (Allied - British)
Nagant Revolver (Allied - Russian)
M1 Garand (Allied)
The M1 Garand, with it's very distinctive "ping", replaced the Springfield '03. as the standard issue Allied rifle. With a long range and powerful caliber, it made an excellent rifle, although not without its problems. This weapon cannot be reloaded manually -- you have to empty a clip before the rifle automatically reloads.
Springfield '03 Sniper Rifle (Allied)
Kar-98 Sniper Rifle (Axis)
Lee-Enfield Rifle (Allied - British)
SVT 40 Sniper Rifle (Allied - Russian)
Mosin Nagant Rifle (Allied - Russian)
Thompson Submachine Gun (Allied)
The Thompson would have to be the most recognized SMG of the war; its unique design and construction made it a distinctive and powerful weapon. It carries 30 powerful .45 rounds per clip, and while it's real-life counterpart was a little heavy, it was still a very trustworthy weapon.
MP40 Submachine Gun (Axis)
Sten Mark II (Allied - British)
PPSH SMG (Allied - Russian)
Browning Automatic Rifle a.k.a. "BAR" (Allied)
While the BAR was used during World War I and many were in service during World War II, a newer version was introduced that boasted a high rate of fire and a more powerful caliber. The BAR carries 20 rounds per clip, and can mow down enemies in a hurry.
StG44 Sturmgewehr (Axis)
The German StG44 was in fact the very first assault rifle ever made, and aided in the design of the modern assault rifles we see today. While Hitler turned away the StG44 at first, it proved to be a very effective weapon on the Eastern front against the Soviets and was immediately put into service. It may not be a match for the American BAR in terms of range, but its high rate of fire makes the StG44 an exceptional weapon.
Mark II Frag Grenade (Allied)
This was the standard issue grenade for U.S. soldiers, and could inflict lethal damage to anyone within 50 yards. An excellent choice for killing at long range.
Mills Grenade (Allied - British)
F1 Grenade (Allied - Russian)
One of the earliest rocket launchers, the bazooka was basically a tube that fired a rocket-propelled grenade through the air at long range. You won't use these often, but you'll be glad to have one if faced with heavy artillery blocking your way.
Winchester Shotgun (Allied)
M1919A4 .30 Caliber Mounted Machine Gun (Allied)
The air-cooled M191A4 is an American machine gun that was perfect for attaching to jeeps just before heading out on patrols. While no match for the German MG42's, they were still used on the front lines when a reliable machine gun was needed. When you get your hands on one of these, you'll be happy to see they come with an unlimited supply of ammo and never need to be reloaded.
MG42 Mounted Machine Gun (Axis)
The German MG42, with a rate of fire 3 times greater than any U.S. machine gun, was a highly feared weapon out on the front lines. It uses a unique delayed blowback firing system to archive it's high rate of fire, and when used in the right situation, can deliver a devastating blow to enemy forces. Like the M1919A4, any mounted MG42's you come across will have unlimited ammo and never need reloading.
MG42 Mounted Machine Gun (Axis)