The sharpshooter's arsenal has been downgraded in KF2 since KF1, since the crossbow in KF1 decapitates Scrakes on head shots, and the 50 cal. rifle the Fleshpound-- Additionally the KF1 LAR on level 25 Sharpshooter was a viable counter-Scrake weapon because it stuns them on (some) head shots, then you simply unload both LAR and S.P. Muskets into them.
In KF2, instant decapitations are specific to which skill tree you use (Left), and the crossbow no longer decapitate Scrakes on head shots-- However, unlike KF1, all perks in the game are now viable big Zed killers, i.e. in KF1, Scrakes and Fleshpounds are more terrifying because their counters are more perk-specific-- it's much harder in KF1 to take care of large Zeds without a Sharpshooter or Demolition (or Support Specialist with AA12) than in KF2.