The M416 is the only 突擊步槍 to allow 5 Attachments at once. It's often a heavily favored weapon amongst players for this reason and can most typically be found in military loot zones.
"Germans do things properly."
Angled Foregrip & Vertical Foregrip
Compensator, Flash Hider, and Suppressor
Extended Mag, Extended QuickDraw Mag, and QuickDraw Mag
Red Dot Sight, Holographic Sight, 2x Aimpoint Scope, 4x ACOG Scope, and 8x CQBSS Scope