Caliber: .224 Valkyrie
Bolt Steel: 9310
Carrier: 8620 Steel
Gas Key: Nitride Treated & Properly Staked with Grade 8 Fasteners
ToolCraft AR-15 .224 Valkyrie BCG made for Palmetto State Armory OEM use. 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.