M16A2

Every trigger pull fires a burst, and that is all this rifle will ever do. Where it shines is the mid-range fight you play in short taps: burst, settle, burst again. Even the in-game description calls its accuracy excellent, and that is what makes the taps work. Spraying a door at point blank is where it feels slow and clumsy.

There is no blueprint. The M16A2 comes out of locked crates, the ones you hack at Oil Rig, on ghost ships and under the Chinook at monuments. That makes it a prize for winning an event, and whoever you beat there usually wants it back on the way home.

It fires the same 5.56 ammo as the LR-300, and the two even recycle into the same parts, a burst module included. A holosight suits it better than a big scope, because bursts are a mid-range tool and the large scopes add recoil on top.