M16 Assault Rifle

"An assault rifle. This shit's gettin' more like 'Nam every second!"

- Bill

"Man, I wanted this rifle since I was nine!"

- Ellis

The Assault Rifle (M-16 Assault Rifle in Left 4 Dead 2) is a Tier 2 replacement for the Submachine Gun and Silenced Submachine Gun, with higher damage and better accuracy. It holds 50 rounds with a 360 round reserve, having less total ammo than the two submachine guns, but being a better overall weapon. The Assault Rifle is the best choice as a general use firearm, being adaptable to virtually every situation.

Tactics
In Left 4 Dead the Assault Rifle is flexible to fit any situation, whether it is clearing a room, mopping up, engaging a Horde or sniping a distant Special Infected. Although It does have some shortcomings, these are relatively minor and do not affect game play very much.

However in Left 4 Dead 2, the standard Assault Rifle faces strong competition from alternative weapon options and players need to make their choices with a finer understanding of each weapon's pros and cons.

The Assault Rife has five main advantages. Firstly, its projectile is capable of penetrating multiple targets (although not to the same degree as the Hunting Rifle). Secondly, the Assault Rifle has a high rate of fire which, together with its longer range relative to the shotgun family, make it a very potent weapon against Tanks. Thirdly, this weapon has the ability to fire on full auto (by holding down the fire control button) and to let off fast double-taps and short bursts (by apply light pressure to the fire controller). Fourthly, it has a large magazine backed up by a generous reserve ammo allowance. Fifthly, the Assault Rifle has a tight cone of fire (limited shot dispersion) meaning that it is safer than a shotgun to use when firing near Survivors.

On the downside, the Assault Rifle has two potential shortcomings: both of which can be minimized by skillful players. Firstly, it is easy to waste ammo if a careless player adopts the bad habit of firing on full auto at all times. In co-op play this can be risky since a full-auto team member can become little more a liability or passenger due to repeated self-inflicted ammo shortages. Secondly, on higher difficulties the Assault Rifle's killing power is degraded relative to other weapons so that it requires at least three hits to take down a Common Inflected.

Tactically, since the Assault Rifle normally only needs two or three shots to do its job and the recoil generated by full-auto firing degrades accuracy at mid to long ranges, burst firing or "headhunting" is highly recommended. The secret is to apply only a very quick and light pressure on the fire control button and skillful players using this technique can even fire single rounds.

Burst firing involves firing a short 2-5 round burst at individual targets before shifting aim and repeating the treatment. This is excellent when shooting at medium and long-ranges (e.g. sniping a Smoker's head just above a distant roof line) and is effective on most difficulty settings except for Expert (wherein targets are more resilient). With burst firing, a player knows that after firing five or six bursts the magazine is about half-empty and is getting due for reload: something that is hard to gauge firing on full-auto.

"Head hunting" with the Assault Rifle takes advantage of its accuracy and the fact that Common Inflected all have the same physical height. Coolly firing at the heads of an on-rushing Horde decimates their ranks in short order. (A variation, "Leg Chopping" works in much the same way: a crouching player aims low for their legs.)

In a group of four Left 4 Dead players facing finales, it is a good idea to have two players with Auto Shotguns and two with Assault Rifles. Position the team in a closet or facing a choke point. The two shotgunners crouch in front whilst the two with Assault Rifles stand behind them and fire over their heads. When the Tank arrives, the team breaks up to engage and reform once he is dispatched. (Note that this tactic is ineffective in Left 4 Dead 2, as the Director will spawn a Spitter to prevent Survivors from staying in one place for too long.)

Pros

 * Higher rate of fire than its counterparts.
 * Is highly versatile, being able to be used in almost any role.
 * Laser sight effectively cancels out any accuracy problems.
 * A skilled user can easily conserve ammunition.
 * Has the fastest reload time out of the three assault rifle variants.

Cons

 * Has the lowest damage per shot of all the assault rifles.
 * Somewhat inaccurate without a laser sight when moving.
 * If firing non-stop and reloading, will burn though ammo fairly quickly.

Left 4 Dead 2
The Assault Rifle returns in Left 4 Dead 2, but has some new animations along with a new name: the "M-16 Assault Rifle". Compared to the other two rifles (the AK-47 and the Combat Rifle), it is the "middle of the road" assault rifle variant in terms of capacity along with balancing stopping power and damage with accuracy and range, making it good for almost any situation.

Behind the Scenes
Early screenshots show that the Assault Rifle lacked text on its left side at one time.

When the Assault Rifle was drawn in early versions of the game, the character would pull the charging handle as soon as he/she took the gun out. The sound for this animation is still played when the Assault Rifle is drawn out in the final version of the game.

The Assault Rifle was based on Counter-Strike ' s M4A1 assault rifle. Its "price" in the gun's weapon file is the same as the M4A1's, and it references the M4A1 in its "animation" listing. Its firing sounds are slightly modified versions of the sounds used for the M4A1. This is because in real life, the M4A1 is essentially a shorter M16.

It had a different reload animation as well. After replacing the magazine, the player would both pull the charging handle and hit the bolt catch.