Magpul MBUS 3 Folding Front Sight, OD Green The next evolution in our MBUS (Magpul Back-Up Sight) line, the MBUS 3 incorporates the best features, strengths and value of our original MBUS and MBUS Pro Sights in a feature-packed back-up sight system. Significantly reduced in size from the MBUS, it sits at just 0.47” high when folded, 1.38” at its widest point, and weighs a scant 25 grams with hardware. Its aesthetics are derived from the MBUS Pro, but the MBUS 3 Front Sight is constructed of our impact-resistant polymer, making it lightweight and extremely durable. Featuring the same spring-loaded technology as its predecessor, they can be deployed with an ambidextrous push-button. The MBUS 3 Front Sight sits at standard AR-height when deployed and includes tool-less elevation adjustment of a dual width enhanced front post similar to the MBUS Pro. Made in the USA. Tool-less elevation adjustment and dual width enhanced front sight post, similar to MBUS Pro 0.47” high when folded and 1.38” wide at widest point Standard AR-height when deployed Polymer construction, smaller size provides light weight and resists operational abuse No tools required for adjustment