Brand new  - Aero Precision 16" 5.56NATO M4 CMV Barrel, Carbine Length.
$160 plus local tax.

www.boomstick-tactical.com
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https://www.armslist.com/store/4971

Caliber 5.56 NATO
Barrel Length 16"
Barrel Material 4150 Chrome Moly Vanadium
Barrel Finish QPQ Corrosion Resistant
Gas System Length Carbine
Gas Block Journal .750"
Gas Port Size (inches) 0.0635
Barrel Rifling Button Rifling
Twist Rate 1:7 inches
Thread Pitch 1/2-28 Threaded
Barrel Extension M4
Weight(s) 28oz