Gen III Gas Block Front sight Replacement Post...
PRI Original Flip Up Front Sight w/.750" Crossbolt Design fits barrels .750 dia. M4/AR15. Eliminates the shadow cast on optical sights mounted on the M16 Flattop receiver. Lightweight hard coated black anodized aluminum top post provides Low reflection.
PRI Flip Up Front Sight with .750 Crossbolt. The base is solid 4140 cast steel with provision for the gas tube an integral part of the unit. Front post is constructed of T6 6061 hard coated black anodized aluminum. Front post uses a thumb wheel to adjustment front sight elevation. Sight weights 4.9 ounces. The center line of barrel to line of sight is 2.57" the cross bolts are #10-32 x 3/4" socket head cap screws.