Red Dead Redemption
The following weapons were used in the videogame Red Dead Redemption:
Single Action Army
A Single Action Army is the first handgun that the player starts with. John Marston fires the gun and other single action revolvers by cocking the hammer back but it is done very quickly and is very difficult to notice unless the camera is angled close to the gun while firing where John moves his thumb after each shot and a clicking sound is heard. The only time the revolver is fired without pulling the hammer back is in cut scenes. It uses Revolver Ammunition.
The Volcanic Repeater is available at the gunsmith in Armadillo and is called the "Volcanic Pistol" in game. It behaves a lot like the Winchester, but with much less range and is more powerful than the Cattleman which is unusual considering the "Rocket Balls" it fired in reality is considered weaker than modern day .25 ACP. Uses Pistol ammunition.
Smith & Wesson Schofield Model 3
The player is presented with a Smith & Wesson Schofield Model 3 Revolver, called the "Schofield Revolver" ingame. It's basically a direct upgrade over the Cattleman (given to the player automatically by Landon Ricketts at the beginning of the Mexico portion of the game), and is almost as strong as the Volcanic. It uses Revolver Ammunition.
The Borchardt C-93 is the first "new age" handgun available as the "Semi-Automatic Pistol". It holds seven shots and can be first purchased at the gunsmith in Escalera once the player gets to Mexico. Dutch van der Linde uses one in the mission "Great Men are Not Always Wise". A free one can be obtained if the player clears out the Fort Mercer bandit hideout after the mission 'We'll Be Together In Paradise'. Uses Pistol Ammunition.
The Colt New Army & Navy appears, named the "Double Action Revolver" in-game. It is the fastest firing revolver in the game, and also happens to be good in the way of damage. It also reloads a little faster than the Schofield and LeMat. It becomes available after completing the Tezoro Azul hideout and uses Revolver Ammunition. There is also a gold-plated version.
A LeMat Revolver (referred to by its real name) is available at the gunsmith's shop in Escalera after the Mexican missions. It holds 9 shots, the under barrel shotgun function is not usable, and it is incorrectly depicted as a break action like the Schofield. This was apparently an idea lifted from the TV western Johnny Ringo (http://www.johnnyringo.net/Pictures/LeMatopen91CU.jpg). However the look as depicted in-game still shows the lack of a "top strap" and still still shows the nipples used to hold percussion caps. It uses Revolver Ammunition and is one of the rare weapons.
Mauser C96 "Broomhandle"
The Mauser C96 "Broomhandle" is called the "Mauser Pistol" in game. It holds an incorrect 15 shots (instead of 10) and is first available at the gunsmith in Blackwater. It uses Pistol Ammunition. It is one of the rare (or just really expensive) weapons. Mauser C96 seen in-game fires fully-automatically; it is anachronistic as the first full-auto C96 variant did not exist before the late 1920s. The fire-rate in multiplayer is much lower than in singleplayer, most likely for balance reasons.
FN Model 1903
Edgar Ross give John a FN Browning 1903 pistol with pearl grips in the mission "Bear One Other Man's Burdens". Called the "High Power Pistol" in-game, it is distinguishable from the Colt 1903 Hammerless by it's longer barrel and slide. It uses Pistol ammunition.
Spencer Model 1860 Carbine
This is the rifle that the player starts with is a Spencer Model 1860 Carbine, called the "Repeating Carbine" ingame. The weapon has a somewhat slow rate of fire compared to later repeaters. It holds 7 shots and uses Repeater Ammunition. Despite the fact that the real Spencer is loaded from a tube magazine in the butt-stock, the game depicts the rifle as a seven-round repeating breech-loader.
Winchester 1892 Saddle Ring Carbine
The Winchester 1892 Saddle Ring Carbine is called the "Winchester Repeater" ingame. This is the second rifle that the player gets, it can either be purchased from the gunsmith in Armadillo or received during an early mission soon after. Holds 10 shots and is a very reliable long arm for a good portion of the game. It uses Repeater Ammunition.
1873 Trapdoor Springfield Cavalry Carbine
A 1873 Trapdoor Springfield Cavalry Carbine can be purchased from the gunsmith in Thieves' Landing and is called the "Springfield Rifle" ingame. This The only real flaw is that expensive Rifle Ammunition is largely unavailable on enemies until late in the Mexican chapter. It unrealistically holds 4 shots instead of one and it appears that John Marston works the gun like a bolt action between shots (he flips the trapdoor up closes it then the hammer gets cocked with no animation). It uses Rifle Ammunition.
The Krag-Jørgensen Rifle can first be purchased at the gunsmith in Escalera, but can be seen in the hands of Mexican soldiers long before then, and is called the "Bolt Action Rifle" in game. This weapon has a fast reload rate thanks to the stripper clips (a feature only very few Krags modified with the Parkhurst Device could use) and is also pretty powerful. The firing speed is about the same as the Henry Repeater but the range is slightly improved. It holds 5 shots and uses Rifle Ammunition.
1860 Henry Rifle
The player can obtain a 1860 Henry Rifle, called the "Henry Repeater" ingame. This is the third repeating rifle that the player gets. It is first available in Mexico while doing a side quest, which leads into a gang hideout side mission. It holds 12 shots and has a faster firing and reload speed than the Winchester Repeater, though the stopping power is equal. Uses Repeater Ammunition.
Remington Rolling Block Sporting Rifle
A Remington Rolling Block Sporting Rifle fitted with a "Long Malcolm" scope is the player's first sniper rifle and is called the "Rolling Block Rifle" ingame. The player picks it up during a job for the Mexican military. It's single shot and uses Sniper Rifle Ammunition.
Evans Repeating Rifle
A Evans Repeating Rifle is available and is classified as a rare weapon according to Rockstar's website. It is called the "Evans Repeater" ingame. It is first available for purchase at the gunsmith in Blackwater. It carries 22 rounds. In reality the .44 Evans Long had a capacity of 26 rounds, wheras the .44 Evans Short carried 34. It has practically the same power as the Winchester and Henry but with just double the capacity and a somewhat faster reload speed. It uses Repeater Ammunition.
Carcano M91/38 Short Rifle
The "Carcano Rifle" in-game is depicted as an M91/38 Short Rifle very similar to the one used by Lee Harvey Oswald. This is rather anachronistic, seeing as the M91/38 model wasn't produced until (as the name implies) 1938; a more appropriate choice would be an original M91 Long Rifle or similar Mannlicher M1895 carbine. It is first available for purchase from the gunsmith in Blackwater. It is basically a combination of the Rolling Block Rifle and Bolt Action Rifle. It holds five shots rather than six in real life and uses Sniper Rifle Ammunition. Interestingly, the rifle is depicted in game as having a straight bolt handle, which would make it impossible to cycle the weapon with the scope attached. The use of stripper clips would also be impossible with the scope mounted. An anachronistic feature of the Carcano's scope is it has a duplex style reticule, as most scopes produced in the day were wire cross hairs. In other words the reticule should have looked much like the Remington Rolling Block's scope reticule.
Sharps 1874 Long Range
The Sharps 1874 Long Range is called the "Buffalo Rifle" in-game. It is the most powerful rifle in the game (hence the name) and can be purchased after getting Rank 5 in the Master Hunter challenges. The weapon reloads pretty fast and only fires one shot at a time. When used from cover there is an annoying glitch where John will reload while exposed to gunfire rather than loading another shot while in cover. It uses Rifle Ammunition.
Modified Mauser 1918 T-Gewehr Anti-Tank Rifle
The DLC Pack "Liars and Cheats" contains a new weapon called the Explosive Rifle, which appears to be a modified Mauser T-1918 Gewehr Anti-Tank Rifle with the metal bipod and wooden pistol grip removed, as well as having a shorter barrel. The gun has tremendous power as it causes instant overkill upon impact.
Colt Model 1878 Shotgun
A Colt Model 1878 double barrel shotgun can be bought at the Armadillo gunsmith, found at the Tesoro Azul hideout, or acquired during the missions "A Frenchman, a Welshman, and an Irishman" and "Remember My Family".
Sawed Off Shotgun
A Sawed-Off Shotgun Can be bought at the Thieves' Landing Gunsmith. In Undead Nightmare, it's given to John by Marshal Johnson.
The Browning Auto-5 shotgun, called the "Semi-auto Shotgun" in-game, holds 5 rounds and can be bought from the Gunsmith at Escalera for $1000 after completing "We Shall Be Together in Paradise" and unlocking access to Mexico.
Winchester Model 1897
A Winchester Model 1897 is obtained during the mission "And the Truth Will Set You Free", used by a thug. A gold version exists in multiplayer.
A Blunderbuss is available in the DLC Undead Nightmare. This antique weapon (as Marston himself reminds) is loaded with pieces of the undead, and causes the zombies to explode. It's good for taking out small groups and clusters in this regard, but the downside is that no undead pieces can be collected for crafting blunderbuss ammo.
The Gatling Gun is first used in the mission "The Assault on Fort Mercer." It is not fitted with any kind of feeding device and has no visible supply of ammo: in line with videogame logic, this means it cannot run out of ammunition.
First used in the mission "The Gates of El Presidio" where it is where it is mounted on several locations throughout the fortress. It is depicted as a breech loader firing cast iron balls and seems to based of off large caliber Armstrong Guns. It can also be used in multiplayer and the DLC Undead Nightmare.
Despite being listed by the game makers as the anachronistic Browning Gun, the weapon is depicted as sharing many qualities with the more period appropriate Maxim gun. It is used mounted on a prototype armored truck in the mission "And You Will Know The Truth" and damaged at the end of the mission when the armored truck tips over. Dutch van der Linde uses one at his fort in Cochinay against John Marston and the U.S. Army in the mission "And The Truth Will Set You Free". One can also be found on the roof of a building in El Matadero.