Magpul MBUS Gen 2

The Magpul MBUS Gen 2 backup sights have earned their place as the default choice for AR-15 builders seeking reliable backup iron sights at an affordable price point. The impact-resistant polymer construction keeps weight minimal while surviving the bumps, drops, and general abuse of regular use. For shooters who need functional backup sights without breaking the bank, the MBUS Gen 2 delivers proven performance trusted by millions of users.

The spring-loaded deployment mechanism allows rapid sight activation from either side of the rear sight or by pressing the top - critical when you need irons fast. The dual-aperture rear sight includes a protected aperture with protective wings and a windage adjustment wheel for tool-free zeroing. The front sight provides elevation adjustment with a standard A2-height sight post that works with tritium upgrade inserts if desired.

While some question the durability of polymer sights, the MBUS Gen 2 has proven remarkably robust in real-world use. The sights may flex under extreme impact rather than breaking, and the polymer construction eliminates concerns about rust or corrosion. For budget-conscious builds, training rifles, or any application where lightweight backup sights are needed, the MBUS Gen 2 remains the industry standard that other polymer sights are measured against.