Reach the indicated rank in Multiplayer mode to unlock the corresponding weapon and/or mount:

Rank 1
Weapon: Cattleman Revolver, Knife
Mount: El Señor

Rank 2
Weapon: Repeater Carbine

Rank 3
Weapon: Throwing Knife

Rank 4
Mount: Lusitano Nag

Rank 5
Weapon: Volcanic Pistol

Rank 8
Weapon: Winchester Repeater
Mount: Turkmen

Rank 9
Weapon: Schofield Revolver

Rank 11
Weapon: Pump Action Shotgun
Mount: Cleveland Bay (Legendary 1 to 4 only)

Rank 13
Weapon: Springfield Rifle

Rank 15
Weapon: Dynamite
Mount: Hungarian Half-Bred (Legendary 2 to 4 only)

Rank 17
Weapon: Double Action Revolver

Rank 18
Weapon: Sawed-off Shotgun

Rank 20
Weapon: Rolling Block Rifle

Rank 22
Weapon: Fire Bottle
Mount: Cleveland Bay
Mount: Hungarian Half-Bred (Legendary 1 only)
Mount: American Standard-Bred (Legendary 2 to 4 only)

Rank 24
Weapon: Semi Automatic Pistol

Rank 26
Weapon: Semi Auto Shotgun
Mount: Bonzo (bull) (Legendary 3 and 4 only)

Rank 28
Weapon: Carcano Rifle

Rank 32
Weapon: Henry Repeater

Rank 33
Mount: Hungarian Half-Bred
Mount: American Standard-Bred (Legendary 1 only)
Mount: Bonzo (bull) (Legendary 2 only)
Mount: Buffalo (Legendary 3 and 4 only)

Rank 35
Weapon: High Power Pistol

Rank 37
Weapon: Double Barrel Shotgun
Mount: Albino Buffalo (Legendary 4 only)

Rank 40
Weapon: Bolt Action Rifle
Mount: American Standard Bred
Mount: Bonzo (bull) (Legendary 1 only)
Mount: Buffalo (Legendary 2 only)
Mount: Albino Buffalo (Legendary 3 only)

Rank 42
Mount: Super Bull (Legendary 4 only)

Rank 43
Weapon: Evans Repeater

Rank 46
Weapon: LeMat Revolver

Rank 49
Weapon: Mauser Pistol

Rank 50
Weapon: Buffalo Rifle
Mount: Bonzo (bull)
Mount: Buffalo (Legendary 1 only)
Mount: Albino Buffalo (Legendary 2 only)
Mount: Super Bull (Legendary 3 only)
Mount: Zebra Donkey (Legendary 4 only)