AR 9 Build Kits

  • OUT OF STOCK
    Aero Precision Complete 16" AR-9 80% Build Kit
    SOLD OUT

    Aero Precision Complete 16" AR-9 80% Build Kit

    $1,009.99
  • KAK 16" 9mm 13" MLOK Upper AR9 80% Build Kit
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    KAK 16" 9mm 13" MLOK Upper AR9 80% Build Kit

    $760.91
  • KAK 4" 9mm 5.5" MLOK Upper AR9 80% Build Kit
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    KAK 4" 9mm 5.5" MLOK Upper AR9 80% Build Kit

    $779.91
  • KAK 8" 9mm 7.2" MLOK Upper AR9 80% Build Kit
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    KAK 8" 9mm 7.2" MLOK Upper AR9 80% Build Kit

    $801.91
  • KAK 8" 9mm 9" MLOK Upper AR9 80% Build Kit
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    KAK 8" 9mm 9" MLOK Upper AR9 80% Build Kit

    $813.91
  • KAK 11" 9mm 9.8" MLOK Upper AR9 80% Build Kit
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    KAK 11" 9mm 9.8" MLOK Upper AR9 80% Build Kit

    $822.91
  • OUT OF STOCK
    ar9 build kit
    SOLD OUT

    Complete 16" AR-9 80% Build Kit

    $859.99 - $894.98

Build your own 9mm platform with high-quality AR-9 build kits from 80% Arms. Designed for reliability and ease of assembly, our kits include the essential components needed to complete your AR-9 build with confidence. Whether you’re putting together a compact pistol caliber setup or a full-size carbine, these kits are built to perform.

Our AR-9 build kits are engineered for compatibility with popular configurations and are optimized for smooth cycling and consistent performance. Each kit is carefully curated to ensure you’re getting dependable parts that meet the standards you expect from 80% Arms.

Ideal for both first-time builders and experienced enthusiasts, these kits simplify the process while still giving you the flexibility to customize your build. Pair your kit with one of our lowers to complete your setup and get exactly what you want out of your AR-9 platform.

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