Resident Evil 4/Weapons and upgrades

Weapons (Main game)
These are the guns you are able to get in RE4's main game. This also covers both the unlockable weapons and the PS2 exclusives.

Pistols
All the Pistols except the Handgun can be bought from the Merchant.

Handgun
This is Leon's starting pistol. Weak power, but when upgraded to its maximum will allow heads to explode more often. Uses Handgun ammo.

Punisher
A pistol that is able to pierce through mulitiple enemies at once. A bit more powerful than the Handgun and saves ammo due to it's pericing ability. It could be said that the gun's name may be a reference to the comic book anti-hero "The Punisher". Uses Handgun ammo. A special objective in the main game both allows you to have the Punisher for free if 10 blue medalians are found and shot, shooting all 15 before buying the Punisher allows you to buy it with a free firepower upgrade.

Red 9
A very powerfull pistol that Luis also uses. But when recieved, it has a slower reload time than the other pistols due to it having to be reloaded from the top. When a stock for the Red 9 is bought, the high recoil from the gun is reduced. Uses Handgun ammo.

Broken Butterfly
The first weapon that uses Magnum ammo that is RARE to find. It's powerfull, but it also has a slow reload time, low ammuniton capacity, high recoil and magnum ammo is rare to find. It's description has a reference to Dirty Harry.

Killer 7
The second weapon that can fire magnum ammo. It's more faster than the Broken Butterfly in both firing speed and reloading speed, but like the Broken Butterfly Magnum ammo is hard to find. The gun itself is a reference to another Capcom game called Killer 7 where Kaede Smith uses the same gun but it has unlimited ammo in Killer 7 compared to RE4.

Matilda (UNLOCKABLE)
A gun capable of firing three bullet bursts. It is unlocked after beating the main game. It is also the same gun that Leon used in Resident Evil 2 when you found upgrade parts for his handgun. Uses Handgun bullets.

Handcannon (UNLOCKABLE)
Unlocked after beating the Mercenaries minigame with all unlocked characters on all 4 levels with 5 stars each level and 20 stars each character. The ultimate pistol, but ammo is even MORE rare than the magnum ammo since it uses a different type of ammo.

Shotguns
The shotgun is found in Chapter 1-1 in once of the houses. The other two shotguns have to be bought from the Merchant.

Shotgun
The first of three shotguns you get, at close range it is powerful enough to kill some enemies, but as range from the enemy increases, the range decreases. Uses shotgun shell ammo.

Riot gun
A slightly more poweful shotgun that is a bit more faster on reload speed, but shares the same weakness as the shotgun. Uses shotgun shells.

Striker
While the appearance might seem to be a grenade launcher, it is really a shotgun that holds more ammo than the other shotguns and is capable of firing shells more quickly. Also shares the same range weakness as the other shotguns. Uses shotgun shells.

Sniper Rifles
These weapons are your long range weapons that can be purchased from the Merchant. There are THREE scopes for the two sniper rifles, two of them are purchased from the merchant and the other MUST be found and is required for later in the game.

Other weapons
These can be bought from the merchant, but the weapons marked with "UNLOCKABLE" is only unlocked by either beating the main game or Assingment Ada amd are purchased from the merchant.

TMP
A cross between a uzi and a machine gun. It is the only machine gun available that you can get in the main game before you gain access to the Chigago Typewriter after beating the game. It has a high recoil that is countered by purchasing the stock for the TMP. The TMP uses its own ammo that is easy to find and useful in situations involving mulitple enemies coming at once.

Rocket Launcher (Regular/Unlimited ((Unlimited IS UNLOCKABLE)))
A one shot weapon that is expensive, but one can be found in RE4. It is incapable of reloading and is discarded in the same way grenades are (meaning that if the rocket launcher is used, it dissapears from the inventory screen). The unlimited rocket launcher however has unlimited rockets and is never discarded unless sold. There is a third rocket launcher in the game, but that is only used at the very end of the game. Close range is SUICIDE, so fire at mid-to-long range from the target.

Mine Launcher
Like the name says, it launches a mine that explodes after a few seconds. A scope can be purchased for more acurate aiming. But the mines can also damage you in it's splash dammage so watch where you fire. Uses mines for ammo.

P.R.L.412 (PS2 exclusive UNLOCKABLE)
A unlockable weapon that can be obtained after beating the PS2 version of RE4 in Professonal difficulty.