 StormWerkz made a series of stock adapters compatible with this model of lower receiver to allow the use of fixed or folding AR-180B or AR-15 stocks.StormWerkz also made an adapter that allowed the use of a Picatinny rail that comes in four variants and installs over the dovetail on the top of the receiver.The Canadian company Wolverine Supplies teamed up with Canadian gunmaker Kodiak Defence to commission the creation of a new AR-180 variant, the WK180-C.