55DC70A : Barrel Sub-Assm, 16.1" MT 4140CM SBN, 5.56mm
SKU
166050
Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.
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- 16.1?
- Medium Taper Profile
- 4140 Chrome Moly
- Salt Bath Nitride Finish inside and out
- 1:7 Twist
- 5.56×45 NATO Chamber
- Threaded 1/2-28
- Midlength gas port
- .750? Gas Journal
| Barrel Parts | Barrels |
|---|---|
| Compatibility | AR15 |
| Caliber/Gauge | 223 Rem / 5.56x45 NATO |
| Ported or Threaded | Threaded |
| Barrel Length (inch) | 16.10 |
| Manufacturer Number | 55DC70A |
| UPC | 815835016153 |
| Color | Black |
| Brand | CMMG |