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Weird residue - Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ R-One Handguard

by Justin Casuga, Verified Owner from TN, United States Written on February 2, 2022
Review for Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ R-One Handguard
Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ R-One Handguard
Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ R-One Handguard
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Justin Casuga's Review of Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ R-One Handguard

Great looking upper, however it had these white marks/residue that won’t come off and it had two little spots of rust where it looks like the finish had worn off. A little unhappy about that but it looks good overall if those marks weren’t there.
Pros:
  • Looks great
  • Very light
Cons:
  • Finish
  • rust spots
  • white residue that wont come off
Would Recommend: Yes
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Last updated 2025-11-12 UTC.