Hi there,
Have you completed both of the two syndicate assignments correctly?
To unlock the .300 Knockout in Battlefield Hardline's Multiplayer mode you must complete two syndicate assignments. Before those assignments can be even started, a pre-requisite must be met. Below are the pre-requirements and the award requirements for each assignment.
- Professional Assignment 2
- 10 Professional specific guns and/or gadgets purchased
- Unlock Professional Gold Service Star 1
- 200 Sniper Rifle kills
- Unlock the Professional's tier 4 Reputation track in 10 matches
- 15 Camera Coins
- 15 Marksman Coins
Please report back if you still having problems with this.
Best regards,
Timmie.