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M-40A1 Sniper Rifle

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M-40A1 Sniper Rifle
Production information

Sniper rifle

Technical specifications
  • 100/hit (by Shephard)
  • 15/hit (by Male Assassins)

5 rounds

Max ammo

15 rounds

Ammo type

7.62×51mm NATO


Bolt action

Rate of fire



Perfect (with the scope)



Used by
Game information


The M-40A1 Sniper Rifle[1] is a weapon used by Adrian Shephard and the male Black Ops assassins in Half-Life: Opposing Force.


The M-40A1 is a powerful bolt-action rifle that can kill many types of living beings in a single hit. It has a scope attached to it to make it easy to engage long range targets. The rifle's firing speed is about the same as that of the Crossbow. It has perfect accuracy, no matter what the player is doing when it is fired.


The M-40A1 is first introduced in the Sniper Range at Santego Military Base, during the training chapter. Despite its appearance at the camp, it is never used by the HECU Marines in Opposing Force. The weapon can then be acquired by killing the only Black Op sniper in the chapter Foxtrot Uniform, or later, on a ground in the same map.


The M-40A1 is best used to kill enemies in one shot from long range, though the weapon is effective on all ranges, even when unscoped. One should try to pick off strong targets, such as Shock Troopers, that would otherwise take a lot of effort to kill at close range. However, the scarcity of ammunition for this weapon should also be kept in mind, and the targets should be picked up wisely.

As the enemies' health increases with the difficulty level, some of the more powerful creatures are able to withstand more than one shot in Hard mode. It is advised to aim for the head, as headshots can kill those targets in one hit, even on the highest difficulty. Alternatively, the enemies can be finished off with a different weapon, preserving the rifle's ammunition.

The rifle is a weapon of choice against the Gene Worm and its portal.

Behind the scenes[edit]

The M-40A1 Sniper Rifle is inspired by the real-world M40 rifle, used by the United States Marine Corps.

The sniper rifle model (a MSG90) from Action Half-Life was used as a placeholder in the television spot of Opposing Force. This version of the rifle had a variable zoom function.[2]

When used by a Black Ops Male Assassin, the M-40A1 is reloaded after each shot, and it does only 15 points of damage per hit, instead of the usual value of 100, lethal for Shephard. This change is perceived as implemented solely for balance, as it would be very difficult for the player to navigate through the level without getting hit.


List of appearances[edit]

See also[edit]


  1. Half-Life: Opposing Force instruction manual
  2. YouTube favicon.png Half-Life: Opposing Force - Television Spot on YouTube