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AR Upper Parts

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[RBA-AR-SK] Spring Kit

Spring Kit

$ 13.99
[RBA-AR-EPCK] Ejection Port Cover Kit

Ejection Port Cover Kit

$ 22.99
[RBA-AR-GBK] Gas Block Kit

Gas Block Kit

$ 29.99
[RBA-AR-GTK] Gas Tube Kit

Gas Tube Kit

$ 39.99
[RBA-AR-GSK] Gas System Kit

Gas System Kit

$ 69.99
[RBA-AR-GSA] Gas System Assembly

Gas System Assembly

$ 69.99
[RBA-AR-MDK] Muzzle Device Kit

Muzzle Device Kit

$ 28.99
[RBA-AR-URA] Upper Receiver Assembly

Upper Receiver Assembly

$ 224.99
[RBA-AR-UPK] Upper Parts Kit

Upper Parts Kit

$ 49.99