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  2. GM COMPLETE UPPER RECEIVERS
  • GORILLA MACHINING 300 BLK OUT UPPER RECEIVER  GORILLA MACHINING 300 BLK OUT UPPER RECEIVER
    For a truly custom build, pick up a upper receiver from GORILLA MFG . We carry top brands, manufactured with high quality materials and process, ensuring the best quality parts for your AR-15 ,M4, M16 AND AR-308 build. These upper receivers are manufactured in house with 7075 aluminum aircraft material and mil-spec components .
  • GORILLA MACHINING LUGER 9MM UPPER RECEIVER  GORILLA MACHINING LUGER 9MM UPPER RECEIVER
    For a truly custom build, pick up a upper receiver from GORILLA MFG . We carry top brands, manufactured with high quality materials and process, ensuring the best quality parts for your AR-15 ,M4, M16 AND AR-308 build. These upper receivers are manufactured in house with 7075 aluminum aircraft material and mil-spec components .
  • GORILLA MACHINING MARKSMAN 5.56/.223 UPPER RECEIVER GORILLA MACHINING MARKSMAN 5.56/.223 UPPER RECEIVER
    For a truly custom build, pick up a upper receiver from GORILLA MFG . We carry top brands, manufactured with high quality materials and process, ensuring the best quality parts for your AR-15 ,M4, M16 AND AR-308 build. These upper receivers are manufactured in house with 7075 aluminum aircraft material and mil-spec components .
  • GORILLA MACHINING MIKHAIL 7.62X39 UPPER RECEIVER GORILLA MACHINING MIKHAIL 7.62X39 UPPER RECEIVER
    For a truly custom build, pick up a upper receiver from GORILLA MFG . We carry top brands, manufactured with high quality materials and process, ensuring the best quality parts for your AR-15 ,M4, M16 AND AR-308 build. These upper receivers are manufactured in house with 7075 aluminum aircraft material and mil-spec components .