AR-Charging Glass (ARCG) protects the paint/coating under your charging handle where rifles inadvertently take abuse to aesthetics. It also seems that because it is made of a scratch resistant material there is less friction during charging. It is like pulling the charging handle over glass or ice.
Recieve 6 ARCGs with this purchase. The product itself is clear. There is currently no way to make them colored. The ARCG is Patent Pending