Mine Thrower

The Mine Thrower is an explosive-projectile weapon, somewhat similar to a Grenade Launcher, except for the fact that its explosive 'darts' will attach to the target when hit. It first appears in Resident Evil 3: Nemesis where it can be found and used by Jill. A different model appears in Resident Evil 4, where it can be purchased from the Merchant and then used by Leon.

Resident Evil 3: Nemesis
The Mine Thrower was an experimental weapon designed by Umbrella and issued to at least one UBCS operative during the Raccoon City Destruction Incident. The weapon works by launching small dart-shaped proximity mines which can attach to surfaces and explode upon detecting nearby enemies. These darts can also be used to attach to enemies directly, therefore operating somewhat akin to a miniature rocket launcher, albeit with a slight delay between impact and detonation. Ammunition for this weapon is very scarce, and cannot be made, and should be saved for fighting the "the pursuer" or large groups of zombies. The mine thrower will damage Jill if she is too close when the dart explodes.

The Mine Thrower is first found by Jill Valentine in the St. Michael Clock Tower on the body of a dead UBCS mercenary, albeit only on the Hard difficulty setting.

When upgraded with an Infinite Ammo case, the mine darts gain a powerful seeking ability that will guide it towards the heads of enemies. Additionally, upon impact with an enemy, the dart will explode instantly, then exit target, and seek the next nearest enemy. It will detonate on every single hit, often resulting in a single dart killing everything in range. The darts track their targets very effectively, but may miss if not given enough travel time to change their trajectory. They will detonate permanently upon contact with the environment. It holds 6 round with 24 ammo located in the entire game. It was used by launching on the wall and then it would explode after a certain time.

Resident Evil 4
The Mine Thrower fires explosive mine darts that detonate after a short time (the duration is slightly reduced in the non-Gamecube versions). The darts stick to surfaces and enemies, causing them to stagger slightly before exploding, doing damage equal to a Hand Grenade. It costs 9,800 pesetas, and a scope can be attached for 8,000 pesetas. The firepower stat of the Mine Thrower actually refers to its explosive blast radius. As with the Mine Thrower in RE3, the blast from an exploding dart can damage Leon if he is too close when it detonates. The Mine Thrower takes up 10 spaces (5x2) of Leon's inventory. The scope takes up an additional 4 spaces (2x2). To start, it has a firepower of 2.0, can fire every 1.33 seconds, takes 3.43 seconds to reload, and has a capacity of 5 darts. Fully upgraded, it has a firepower of 6.0, can fire every 1.33 seconds, takes 2.57 seconds to reload, and has a capacity of 10 darts. The Mine Thrower costs 192,800 pesetas to fully upgrade (200,800 including the scope). Its exclusive upgrade increases the blast radius even further and gives the mine darts heat-seeking capabilities. Mine darts are very rare and do not appear unless Leon has a Mine Thrower. There is also a small glitch in where before the Drill Zealots come you can fire a heat seeking dart through the small upper corner of the wall before they appear in which kills them before the cut scene.

Trivia

 * The mine thrower featured in Resident Evil 3: Nemesis, is one of two weapons in the game that can harm Jill if the charges explodes near her.
 * In Resident Evil 4, if a player has the Mine Thrower and the Hand Cannon, they would only obtain ammo for the Handcannon (this needs to re-confirm for the fact that on PC version, players can have both Handcannon and Mine Thrower ammo to drop).
 * In both Resident Evil 3 and 4, mine thrower ammunition is stored in small specialized containers, unlike most other munitions which are stored in their respective cardboard boxes.
 * Resident Evil 4's Mine Thrower can be especially useful when dealing with the zealots on the fire-emitting dragon heads in the castle. Players will often not have a clear line of sight with the ganados, and the mine thrower only needs to be fired in their general area to finish them off.
 * The Exclusive Upgrade in RE4 is useful for seeking hidden targets, however it takes away the freedom of aiming.
 * Heat-seeking mines are especially effective against Regeneradores.
 * In Resident Evil 4, the mine thrower is especially useful to destroy the Novistador nest in the castle. Only three shots are necessary to destory it on the highest difficulty level.