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458 SOCOM Upper Assembly Bull Style Profile Mounted on Standard AR-15 Lower Assembly
458 SOCOM Complete Upper Assembly.  The 458 SOCOM Upper Assembly brought to you by Bishop Ammunition
Manufacturing is a complete ready to install upper assembly.  There are no changes or
modifications required of any standard AR-15 Lower Assembly to install our upper assembly.
The 458 SOCOM uses standard GI magazines for 5.56 NATO/.223 Remington AR-15.  Please
note that plastic magazines may not allow chambering of 458 SOCOM due to a ridge that is at
the center of the front of the magazine.