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CMMG, Inc .300 AAC Blackout Upper 16in, MK4LE
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300 Blackout Upper

by dalegoble, from FL, United States Written on December 26, 2016
Ran this upper today at the range for the first time. Ran Factory 125gr Ammo, Hand-loads 110,125,147..
Ran couple hundred rounds.
Ran Flawless....No Issues.
Lower is off a Ruger .223 M4
Stock .223 Buffer and Buffer spring.
Great Upper...
Pros:
  • Price
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No