One Shot, One Kill.
("The only thing I feel when I kill is the recoil from my rifle" - Unknown Sniper)
The M45 Marksman Rifle is the pinnacle of decades of anti-personnel rifle technology. Its range far exceeds standard issue UA General Purpose Rifle-12, and it hits with a much harder punch. The downside to such a precise weapon is that although it fares very well against a few targets at a distance, or lone enemies, it is generally regarded as a very poor choice versus larger hordes. The M45 is extremely slow in its rate of fire, and does no splash damage.
Overall the weapon should be employed against light targets, or when enemies are few in number. It is the perfect secondary weapon for a non-damage output class as it conserves ammo and is very efficient in killing single threats. Its best role is that of killing the annoying and dangerous Gargoyles before they can reach you or your allies.