“PSR” Sniper Rifle Long-Range Ammo Bugged

The “Long-Range” ammo type for specifically the “PSR” sniper rifle is bugged. It does nothing and costs 5 “attachment points” extra. On the “M2010ESR” sniper rifle, the long-range ammo works presumably as intended, increasing the bullet velocity. Should it not do the same thing across all snipers? Please look into this. Thank you.