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- 16" M4 Contour Barrel
- .223 Wylde Chamber (shoots 5.56 or .223)
- 4150 Chrome Moly Steel
- Parkerized/Phosphate Finish
- 1/2-28 Threads
- 1:8 Twist
- Carbine length gas
- m4 feed ramps
- .750 diameter at gas block.
- Item #: 16-223m4
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