The new MBUS (Magpul Back-Up Sight) GEN 2 set is a low-cost, color injection molded, folding back-up sight set. 

Includes:

Magpul Industries MAG247 : Mbus Gen II Front Flip Sight Blk (adjustment tool is included)
Magpul Industries MAG248 : Mbus Gen II Rear Flip Sight Blk

Front Sight:

The MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-rails. Made in U.S.A.

Front sight should NOT be mounted on a gas block.

Features

• Impact resistant polymer construction provides light weight and resists 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.
• Reduced size for greater compatibility
• Spring-locking front sight post holds consistent elevation

Specifications

• MBUS – Front Gen 2
  • Weight, w/ hardware: 1.2 oz.
  • Height above rail, stowed: ~0.51 in.
  • Length, stowed: 2.6 in.
  • Length, deployed: 1.5 in.

Rear Sight:

The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rails. Made in U.S.A.

Features

• Impact resistant polymer construction provides light weight and resists 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.
• Protective wings shield the dual flip apertures
• Sight can still be folded with either large or small aperture in position
• Detent knob easily and positively adjusts windage
• Reduced size for greater compatibility (folds to a profile of only approximately a half-inch)
• Both small and large apertures are on the same plane

Specifications

• 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.