{{Article|hl1|good}}
{{Weapon Infobox
| image=FileM40A1.jpg|250px
| name=M-40A1 Sniper Rifle
| affiliation=*Hazardous Environment Combat Unit|HECU
*Black Ops
| manufacturer=
| model=
| type=WikipediaSniper rifle|Sniper rifle
| cost=
| damage=Extreme
| magazine=5 rounds
| maxammo=15 rounds
| damage=*100/hit (by Shephard)
*15/hit (by Male Assassins)
| fire=
| ammotype=Wikipedia7.62×51mm NATO|7.62×51mm NATO
| operation=Bolt action
| rate of fire=Slow
| accuracy=Perfect (with the scope)
| range=Long
| usedby=
*Adrian Shephard
*Male Black Ops
| counterpart=Other CategoryAccurized weapons|accurized weapons
| counterwep=
| entity= weapon_sniperrifle
}}
The '''M-40A1 Sniper Rifle'''''Half-Life Opposing Force'' instruction manual is a weapon used by Adrian Shephard and the male Black Ops assassins in ''Half-Life Opposing Force''.
==Overview==
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 (Half-Life)|Crossbow. It has perfect accuracy, no matter what the player is doing when it is fired.
==Appearances==
The M-40A1 is first introduced in the Sniper Range at Santego Military Base, during the Boot Camp|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 Ops|Black Op sniper in the chapter ''Foxtrot Uniform'', or later, on a ground in the same map.
==Tactics==
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==
The M-40A1 Sniper Rifle is inspired by the real-world WikipediaM40 rifle|M40 rifle, used by the United States Marine Corps.
The sniper rifle model (a WikipediaHeckler & Koch PSG1) from ''WikipediaAction Half-Life|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.{{YouTube|url=zHVwIK9zHa0|text=''Half-Life Opposing Force'' - Television Spot}}
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.
==Gallery==
FileM40a1 hud.PNG|HUD icon.
FileTrailer rifle.png|The placeholder viewmodel from the television spot.
FileAhl msg90.png|The actual model from ''WikipediaAction Half-Life|Action Half-Life''.
FileM40A1.jpg|Worldmodel.
FileSniperrifleop4.png|Viewmodel.
FileM40A1 clip.jpg|M40A1 ammunition, depicted as two magazines.
FileM40A1 cardridge.jpg|Shell model used when firing, as part of the viewmodel. No worldmodel is used when firing.
FileOf5a1 sniper.jpg|The only Black Ops|Black Op sniper in the entire game.
==List of appearances==
*''Half-Life Opposing Force'' {{1st}}
==See also==
*HECU Sniper
==References==
{{Reflist}}
{{Weapons}}
{{HECU}}
{{Black Ops}}
CategoryWeaponsCategorySniper riflesCategoryBlack Ops weaponsCategoryHECU weaponsCategoryHalf-Life Opposing Force
