Magpul | MBUS Sight | Olive Drab Green

The MBUS Gen 2 folds down to just half an inch off the rail and pops up instantly with a spring‑loaded push from either side -⁠- no fumbling to find a button under stress. Impact‑resistant polymer keeps it light without turning fragile, protective wings shield the dual apertures from knocks, and it sits at the same height‑over‑bore as a standard A2 iron sight for a natural, familiar sight picture. It's the backup sight that's earned its place on more ARs than almost any other.