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Improve accuracy! 14 1 / 2 " and 16" M4 Barrels replace your worn - out front end!
Burned-out barrel? We've got your new part right here.
State Caliber, as available in the Shopping Cart.
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CBC 300 BLK AR-15 Upper Receiver Less BCG
CBC 5.56 NATO/.223 Remington AR-15 Upper Receiver Less
CBC AR-15 5.56 NATO/.223 Rem. Upper Receiver Less
DoubleStar 5.56 NATO/.223 Rem. AR-15 Upper Receiver Less
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