MAGPUL SIGHT MBUS FRONT BACK-UP SIGHT POLYMER BLACK
FEATURES
-Impact-resistant polymer construction provides light weight & resists operational abuse
-Spring-loaded flip up sight easily activated from either side or by pressing the top
-Detent & spring pressure keeps sight erect but allows for unobstructed folding under impact, etc.
-Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard* & 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
Elevation Adjustment:
~1.6 MOA (1.886"/100m) per click with a 14.5" sight radius
~1.2 MOA (1.367"/100m) per click with a 20" sight radius
*Note: Cannot be mounted to a railed gas block due to excess heat issues. Front MBUS must be mounted to a railed fore end on the same plane as the receiver rail. Because of this the sight is also not compatible with MOE Hand Guards.