You don't see very many players using it as their primary, but there are a couple of us who are focusing on those headshots as the means of killing.
Raise your hand, handcannon user and let's hear a "I'm your huckleberry."
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Its outclasses in pve and pvp so no. Perhaps if the higher level ones are more viable I may use them though tbh... I still prob would never see a reason to use them over scout rifles, pretty sure people only use it now cause they are like "ZOMG LOOKS KEWL". :D