Barnet is supposed to be a Brinks version of Barret which is a .50 cal round which can lierally cut a person in half with one shot..so yeah im pretty sure they are not goin to fix this..nor should they
The Barnett is only a reference to the Barrett M82 or M85 in name. In terms of looks it is similar to the German Mauser SR-93 (not a .50 cal. round). Just want to clear this up before people start basing their discussion on this. (PROOF: http://brink.wikia.com/wiki/Barnett)
I've been using the Barnett for the last few days and I don't feel that it is overpowered. For the record, the best class to use it with is an engineer (I would go with a light, but you can use whatever you want), because you are guaranteed to have a weapons buff. Being able to kill a light in one shot is a huge edge that you NEED in order to help contain the other team a little bit (as lights can run away the most easily).
The Barnett is a hit or miss weapon, where if you miss your first shot, don't expect to get a second shot off cleanly. That being said, if you hit them and don't kill your opponent, you're in nearly the same situation (except it's feasible to pull out a sidearm and quickly take them down). While re-chambering a round, you cannot sprint or change between ADS and hipfire, which is a MAJOR drawback. It basically means that you are almost certainly dead if you get caught out in the open by a medium or a heavy who will not die in one shot (I'm ignoring a buffed light, just so you know).
Some tips for using it:
1. Be an engineer to have a guaranteed weapons buff (as said before).
2. Being a light will allow you to displace faster than you would normally. This gun doesn't make a good secondary anyways.
3. Get in the habit of zooming out as soon as you take your shot (quickscope style). You can't get out of ADS while re-chambering, giving you tunnel vision during that time (assuming you use a scope or red dot, which I'd prefer considering how accurate this weapon is).
4. Try and reload after the third shot and not 4th. In the event that you need to reload on the 4th, you will have to wait until your character attempts to re-chamber before being able to switch weapons, leaving you helpless during this time.
5. Don't rush the front. EVER! This should be obvious.
6. Having a turret cover your flank is a nice perk to being an engineer (also being able to repair the turret). Watch out for nades though!
7. No scopes are fairly accurate. You have the spray of an SMG, but hitting people mid-range is entirely viable, which leaves you in a good position to switch to the sidearm to finish the kill.
8. Use a sidearm with this weapon (aka, be a light). The quick equip speed matters with this gun because of the terrible fire rate normally. This is the only time that I think it is mandatory to have a sidearm instead of any other weapon.