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Experiment to find affordable upper in 300blk - OpticsPlanet Exclusive Moriarti AR-15 10.5in 300 Blackout Upper Receiver, A2 Flash Hider

by Roger, from FL, United States Written on December 18, 2025
Review for OpticsPlanet Exclusive Moriarti AR-15 10.5in 300 Blackout Upper Receiver, A2 Flash Hider
OpticsPlanet Exclusive Moriarti AR-15 10.5in 300 Blackout Upper Receiver, A2 Flash Hider
OpticsPlanet Exclusive Moriarti AR-15 10.5in 300 Blackout Upper Receiver, A2 Flash Hider
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Roger's Review of OpticsPlanet Exclusive Moriarti AR-15 10.5in 300 Blackout Upper Receiver, A2 Flash Hider

I bought it with intention to replace hand guard with a Geissele SMR MK8. First issue gas block had a cross threaded screw. Drilled that out and replaced it. Second issue Upper Receiver is not to Mil Spec standards. Takedown pin holes had to be metal filed open in order to pass the pins. Next time I will stick with Aero or BCM.
Pros:
  • Affordable
Cons:
  • Poor craftsmanship
Would Recommend: No
Was it helpful to you? Yes | No
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