In Back to Karkand DLC there are 10 new weapons that can be unlocked. Unlike other weapons, where you had to rank up the class or your rank to unlock, BTK weapons are unlocked by finishing assignments. Below I have listed everything you need to know about unlocking any of the BTK weapons and tips to help your quest to unlocking them.

Weapon: FAMAS
Class: Assault
Requirements: None
Assignment Name: Best Friends Forever
Objectives:
Tip:
Staying with your squad and doing your medic duties will help you finish this assignment faster.

Weapon: L85A2
Class: Assault
Requirements: You will need to complete assignment “Best Friends Forever” to unlock this assignment.
Assignment Name: Professional Russian
Objectives:
Tips:
Ribbons are awards that are given for accomplishing a task in a game, such as completing individual rounds, reaching a certain amount of objectives, or obtaining a specific amount of points in a round. In Battlefield 3 ribbons can be categorized into six categories; Kits, Weapons, Vehicles, MVP, and Other. This guide will show you how to achieve all the ribbons the easiest way possible.

Medical Efficiency Ribbon
In a round, do 5 revives
To revive a person in Battlefield 3 you will need the defibrillator, which is unlocked at 4,000 Assault score (First unlock for the Assault Class). Once you have unlock the defibrillator, play as a Assault, stay with your teammates and revive any fallen teammates.

Maintenance Efficiency Ribbon
In a round, do 7 repairs
In Battlefield 3 there only two gadgets that will repair vehicles; Repair Tool and EOD Bot. Engineers get the Repair Tool from the beginning, while EOD Bot in unlocked at 25,000 Engineer score. The easiest way to get repairs is to jump in friendly tank and when the tank is damaged get out and repair it. If you are have trouble get seven repairs in one round play Conquest, where the rounds are longer and have more vehicles.

Resupply Efficiency Ribbon
In a round, do 7 resupplies
Play as the Support Class and throw down Ammo Boxes, you start out with it, to teammates who have fired their weapon. Keep on doing this and you will achieve this ribbon in no time.

Surveillance Efficiency Ribbon
In a round, get 5 motion Sensor Assists
In Battlefield 3 you can only get motion Sensor Assists by using the MAV, which is unlocked at 45,000 Recon score. Once you have unlocked the MAV; Play as a Recon, deploy the MAV, and spot every enemy you see. Every time a teammate kills a person who you have spotted using the MAV will get you a Sensor Assists.

Assault Rifle Ribbon
In a round, kill 7 enemies with Assault Rifles
Get at least seven kills with the following weapons in one round.

Carbine Ribbon
In a round, kill 7 enemies with Carbines
Get at least seven kills with the following weapons in one round.

Light Machine Gun Ribbon
In a round, kill 7 enemies with Light Machine Guns
Get at least seven kills with the following weapons in one round.

This is my first achievement guide but I have been an achievement hunter for almost 2 years now and have read lot of guides by experts. If you find any mistakes (Including but not limited to spelling and grammar mistakes) or have suggestion contact me or just leave a comment.
Achievement list: Brink Achievements
Achievement difficulty: 4/10
Approximate time: 10 to 15 hours
Unobtainable achievements: 0
Well done! [10
]
Complete your first 1 Star Challenge
Who’s bad? [25
]
Complete all 1 Star Challenge
Very well done indeed! [20
]
Complete your first 3 Star Challenge
King of the world! [100
]
Complete all 3 Star Challenges
The first thing you want to do after you make a character is to complete all the challenges because in this game the AI on the enemy team will become more difficult to beat as you level up. If you already have character that is high level just make a new one. There four different type of challenges and each has three levels (Stars) which are all easy to beat with a new character. *You have to do all the challenge on solo!
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