The grenade launcher should be used to clear out large groups of enemies at once.Since its bullets hit instantly, the player can attack the Controller and avoid its plasma balls with ease. The Alien Controller is easy to kill with the SMG.With HECU soldiers, one should stay out of their effective range or make use of cover, since they have the same SMGs and slightly better accuracy. With Vortigaunts, one should remember to move often to avoid being hit by the Vortigaunts electric bolts. The Submachine Gun is effective on small groups of Vortigaunts and HECU Marines.Groups of weak enemies, such as Headcrabs or Houndeyes, can easily be killed with the SMG.Save the bullets and fire the Submachine Gun's grenades instead. The player should be sure not to use the Submachine Gun's bullets against large groups of enemies for the Sub Machinegun's bullets do only 5 points of damage.The Submachine Gun's accuracy is suitable for short to medium combat ranges, but has poor accuracy at longer ranges, so it is recommended to use five round bursts for long range.However, in some related games such as Half-Life: Day One and Half-Life: Opposing Force, the Submachine Gun already holds 50 rounds when picked up. The player must reload the gun to get 50 rounds in the magazine. When a player picks up an SMG for the first time, it will have 25 rounds in its magazine.After that, it can be found in areas controlled by the HECU and picked up from dead HECU Marines. It can be found next to a dead HECU Marine in the first room that has Sentry Guns. This weapon is first obtained at the start of the Half-Life chapter 'We've Got Hostiles'.It does not need to be reloaded, so the player can fire as many grenades as they want until they run out of ammo for it. The attached grenade launcher fires powerful explosives that will automatically explode when hitting the ground.Both the Submachine Gun and the 9mm Pistol use 9Г—19mm Parabellum and share the same ammunition reserve, making the Submachine Gun and the 9mm Pistol very easy to find ammunition for. The SMG's bullets will instantly hit a target as soon as the gun is fired.

Mp5 with grenade launcher