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This is a Rock River Arms .458 SOCOM 16" Midlength A4 Complete AR-15 Upper Receiver. Harness the awesome power of the .458 SOCOM cartridge in your AR-15 with this complete upper receiver from Rock River Arms. This upper comes as a flattop with a railed gas block and upper receiver. It is also equipped with an A2 style flash hider and Rock Rivers free floating handguard. Completing the assembly are a factory bolt and bolt carrier assembly as well as a standard type charging handle. Simply pin the receiver in place on your standard AR-15 lower receiver, insert the proper magazine, and fire away.
*Copy of Photo ID required for purchase of any uppers.
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