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Magpul Back Up Front Sight (MBUS) Gen2

  • Magpul Back Up Front Sight (MBUS) Gen2
  • Magpul Gen 2 MBUS Front Sight
  • MAG247-FDE
  • MAG247-GRY
  • MAG247-ODG
  • Magpul Back Up Front Sight Key
  • Image 7
  • MAG247-BLK
  • Image 9
  • Image 10
  • Image 11
  • Image 12
  • Magpul Black Gen 2 Back Up Front Sight (MBUS)
  • Magpul Flat Dark Earth Gen 2 Back Up Front Sight (MBUS)
  • Magpul OD Green Gen 2 Back Up Front Sight (MBUS)
  • Magpul Grey Gen 2 Back Up Front Sight (MBUS)

Magpul Back Up Front Sight (MBUS) Gen2

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Calculated at checkout
$39.95 $33.95

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  • Made by impact resistant polymer, 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.
  • Can be install on any Mil-Spec 1913 Picatinny and STANAG 4694 rail
  • Provides the same height-over-bore as standard A2 irons
  • Protective wings shield the spring-locking A2 front sight post
  • Elevation adjustment tool included, but most aftermarket A2 front sight adjustment tools may be used as well
  • Made in the U.S.A.


  • Material: Polymer
  • Weight: 1.2 oz.
  • Height above rail, stowed: ~0.51 in.
  • Length, stowed: 2.6 in.
  • Length, deployed: 1.5 in.

*Not recommend to mount on a railed gas block due to excess heat issues.


The Magpul Back Up Sight (MBUS) is a must for any AR-15/AR-10 owner. Constructed from virtually indestructible polymer, these sights can serve as a back up to your scope or red dot. They also make an excellent light weight primary sight.

Since the Magpul MBUS front sight offers the same height-over-bore distance as the standard A2 iron sights, AR-15/AR-10 devotees will feel right at home with these sights. The sight post is protected by two "wings" on either side to prevent it from being damaged or bumped out of zero.

When the sight is not in use, it can be folded down. When it is needed again, you can instantly pop this spring loaded sight back into position with no loss of zero! The MBUS is optimized for the AR-15 and M-16 family of rifles, but it will also fit any weapon that features a 1913 Picatinny rail.

The Magpul Back Up Front Sight (MBUS) Gen2 comes in: Black, Flat Dark Earth, OD Green and Stealth Gray

Write Review

  1. Magpul Back Up Front Sight (MBUS) Gen2 5 Star Review

    Posted by on 22nd Jul 2016

    Great back up sights if your primary optics fail. Easy to install and adjust within minutes. Have these installed on all of my AR builds.

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