Big Bore Ar15 450 bushmaster / 458 socom etc enlarged port upper
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Stripped upper with enlarged ejection port for your ar15.  Uses standard door and forward assist.  The enlarged ejection port is nice for 450 bushmaster, 450 socom, 500 s&w, 50 beowulf, and other larger caliber casings. 

  • Item #: bigboreupper

Big Bore Ar15 450 bushmaster / 458 socom etc enlarged port upper

Price: $59.99
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