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  1. Can anyone identify this upper receiver?

    Colt Long Guns
    traded an sks for what i was told was a brand new never fired colt ce1000 expanse with added fwrd asst and dust cover... i have never seen this mark on an upper receiver and i have searched and googled for about 12hrs and cant identify it. also the barrel is marked 5.56 NATO 1/7 P not 5.56...
  2. Need Clarification for M4s

    Colt Long Guns
    What's the difference between the LE6920 M4, CE1000 Expanse M4, and the AR6721 Tactical Carbine?
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