1) Scope isn't that great, and still produces lens flare(?). Visually appealing but hard to track targets critical spots.
2) Zooms in too far for practice primary use. It's meant to have a higher than average zoom in because it's a sniper, but you might as well just carry a normal sniper with its awkward zoom
3) Unappealing damage. The gun should do slightly more than every sniper because of the bolt action. There's no reason to use it over fast firing snipers.
4) Insufficient ammo. Always running out even though its primary (laughable surplus ammo, the mag size is decent). Since they insisted on giving the gun it's zoom, you can't get too up close and personal, therefore you can't clear rooms to pick up ammo drops before running out of ammo.
5) Fire rate. The bolt action makes this gun slow and clunky. Extremely unforgiving with missed shots.
Overall an underwhelming gun, if Xur sold it I wouldn't even buy it for 9 coins.