5.56
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| Aero Precision M4E1 Threaded 7.5" 5.56 ATLAS R-ONE Upper | Aero Precision M4E1 Threaded 7.5" 5.56 ATLAS S-ONE Upper | Aero Precision M4E1 16" 5.56 Mid-Length ATLAS R-ONE Upper |
$454.99 $319.00 | $454.99 $319.00 | $534.99 $375.00 |
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| Aero Precision M4E1 16" 5.56 Mid-Length ATLAS S-ONE Upper | Aero Precision M4E1 16" 5.56 Mid-Length Barreled Upper Receiver | Aero Precision M4E1 Threaded 16" 5.56 M4 ATLAS S-ONE Upper |
$534.99 $405.00 (1) | $544.99 $409.00 (1) | $529.99 $369.00 |
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| Aero Precision M4E1 18" 5.56 Rifle Length ATLAS S-ONE Upper | ||
$544.99 $409.00 | ||
