For your AR15, M4, M16, SPR, SAM-R.

 

PRI Flip Up Front Sight w/ .750" Crossbolt Design FUFS-B Fits Barrels .750" dia. M16 M4 and AR15 Eliminates the shadow cast on optical sights mounted on the M16 Flattop receiver Lightweight aluminum top post Low reflection matte black corrosion resistant coatings The sight post locks in the up and the down position Solid 4140 cast steel base with provision for the gas tube an integral part of the unit Accepts any standard retrofit M16 front sight post.    Made by Precision Reflex Inc.