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Dark Hour Defense AR15 Billet Upper Receiver
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Jeff's Review of Dark Hour Defense AR15 Billet Upper Receiver

The machining and design looks nice, but the area forward of the ejection port and behind the barrel nut are not Mil-Spec dimensions.

As such, if you have a handguard with anti-rotation tabs or wraparound design, it may not fit. Some may see this as a "feature" because it's thicker where it supports the barrel extension, but compatibility with Mil-Spec dimensions is more important, I'd think.
Pros:
  • Solidly built
  • Nice machining
Cons:
  • Compatibility issues
Would Recommend: Yes
3 of 3 found the following review helpful.
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