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Mfg Item #: 51655105972
Caliber: .224 Valkyrie
Bolt Steel: 9310
Finish: Nitride
Carrier: 8620 Steel
Gas Key: Nitride Treated & Properly Staked with Grade 8 Fasteners
This BCG functions with all PSA .224 Valkyrie Uppers. 9310 steel bolt assembly, nitride treated for durability. 8620 carrier, nitride treated, with a nitride treated gas key properly staked with grade 8 fasteners.