AR15 / M16 .223 / 5.56 1:9 TWIST 16" FLUTED HEAVY BARREL
USA manufactured .223/5.56 stripped 16" 1:9 twist AR15 HEAVY BARREL
* M4 cut feedramp barrel extension
* Threaded 1/2 x 28 tpi
* Gas hole drilled
* Chamber extension installed
* Not chrome lined.
Uses a .750 gas block with a carbine length gas tube
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