Marksman's Challenges are weapons challenges that unlock the Red Dot Sight, Silencer, ACOG Scope, and Foregrip (for LMGs and Shotguns) attachments. They require X amount of kills to unlock these attachments. The first challenge for Assault Rifles and SMGs requires 25 kills, which unlocks the Red Dot Sight. The second challenge requires 75 kills, and unlocks the Silencer. The third and final challenge requires 150 kills, and unlocks the ACOG Scope. Shotguns and Sniper Rifles have different attachments and kills required compared to Assault Rifles, LMGs, and SMGs. LMGs unlock Red Dot Sights after 25 kills, Foregrip after 75 kills, and ACOG after 150 kills,but basically it's the same process. Shotguns unlock the Red Dot Sight after 25 kills, and Foregrip after 50 kills. Sniper Rifles just unl