Ar15 carbine - Centurion Arms C4 Rail Handguard

Purchased a 9.5 and 11.5 initially. When they arrived, realised my measurements were off and in fsct needed 2x 9.5s. Optics planet provided phenominal customer service and helped me replace the 11.5 with another 9.5 hassle free.

The Rails are worth every penny. Purchased a different cheap rail off a differenr website thinking rails are just a piece of metal at first. Wrong choice as when i went to zero my ar, the handguard was wobbling, had a lot of play to it. Very uncomfortable.
This rail is solid, quality item, exactly what i was looking for.