Magpul MBUS Gen 2 REAR Back Up Iron Sight - BLACK

MSRP: $57.95
Your Price: $49.95
(You save $8.00 )
(28 reviews) Write a Review
Stock Status:

Out of stock

Back Up Iron Sight for your AR-15, M4, M16A4.
Made by Magpul® Industries.
The new MBUS (Magpul Back-Up Sight) GEN 2 is a low-cost, color injection molded, folding back-up sight.
The dual aperture MBUS Rear Sight is adjustable for windage and fits all MIL-STD-1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16/M4 platform.
Made in the U.S.A.

Color: BLACK

NEW Features for GEN 2
  • Reduced size for greater optics compatibility
  • Both small and large apertures are on the same plane
  • Impact resistant polymer construction provides light weight and resists operational abuse
  • Spring-loaded flip up sight easily activated from either side or by pressing the top
  • Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact, etc.
  • Clamps to any MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons
  • Protective wings shield the dual flip apertures
  • Detent knob easily and positively adjusts windage


  • MBUS - Rear Gen 2
    • Weight, w/ hardware: 1.3 oz.
    • Height above rail, stowed: ~0.51 in.
    • Length, stowed: 2.6 in.
    • Length, deployed: 1.5 in.

New from the Magpul production line comes the redesigned MBUS, the MBUS Gen2. Compatible with all Milspec 1913 Picatinny rails, this second generation introduces a slimmer profile for better optics compatibility and a lower profile stowing position as well as a positive detent to securely lock the front sight post in place. The rear sight is adjustable for windage and utilizes plane small, large and the NAWS (No Aperature Window Sight) apertures.

Lightweight reinforced polymer construction keeps added ounces to a minimum, while the spring loaded folding design ensures that the MBUS Gen2 will stay out of the way until you need it. This combination of compact durability and one-touch rapid deployment takes any system to the next level. Order your Rear MBUS Gen2 sights today!

***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit***

28 Reviews

  • 4

    Posted by Bruce Welch on Jun 4th 2019

    I've heard people had problems with plastic but, at least I have a real back up now.

  • 5
    Customer review

    Posted by Joseph Bangor on Dec 17th 2017

    Review body is empty

  • 5
    Magpul MBUS Gen 2 REAR Back Up Iron Sight - BLACK

    Posted by Larry L on Dec 4th 2017

    Works and looks great. Very fast shipping.

  • 5

    Posted by Derrick Hug on Oct 27th 2017

    Good to go!!

  • 5
    AR-15 Magpul iron sight

    Posted by Daniel Pierce on Oct 27th 2017

    The product is as advertised. I have yet to shoot my weapon with the sight.

  • 4

    Posted by Craig Scharf on Oct 27th 2017

    Plastic but does the job

  • 4
    Great product

    Posted by Don Stephens on Oct 27th 2017

    Works nicely with standard front sight.

  • 5
    Great Rear Sight

    Posted by anonymous on Dec 28th 2016

    Not much to say here. Great little collapsible rear sight. Was easy to install and works as advertised.

  • 5
    Sight works as expected.

    Posted by C. Collins on Dec 27th 2016

    Not much more to say on that, it just works.