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KAC-Knight's Armament 6 Rib Handguard Panel, 3.90 Inch Length (97168)
Optional R.A.S. panels are used on a rail where there is an accessory such as a Forward Pistol Grip mounted
The optional R.A.S. panels cover up the exposed part of the rail that is not covered by the accessory, they are available in 6 different lengths.
Panels are sold individually, not as a set.