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14.5"
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AR-15 5.56/.223 14.5" M4 contour barrel / .223 WYLDE / 1:7 14.5” M4 .223 WYLDE CALIBER BARREL (SHOOTS BOTH, 5.56 NATO AND 223 REMINGTON) GAS BLOCK .750 M4 BARREL EXTENSION MATERIAL 4150 CMV 1-7 TWIST CARBINE GAS SYSTEM NITRIDE COATEDBARREL EXTENSION MIGHT BE IN NITRIDE AS WE..AR-15 5.56/.223 14.5" M4 contour barrel / .223 WYLDE / 1:7 14.5...$99.95$149.95