KWA VM4 Ronin KeyMod Airsoft AEG 2.5 / 3 Upper Receiver Kit

SKU: 107-00110

Model: VM4 Ronin 10" SBR Upper
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The KWA VM4 Ronin AEG 2.5 / 3 Upper Receiver Kit are designed to be quick drop-in system for KWA's new airsoft rifles.  These kits feature a solid, one-piece upper receiver and a Japanese 6.05 semi-tightbore barrel, along with our one-piece rotary hop-up, so it’s ready for a super-quick ten-second installation on your RM4 or VM4 AEG. The Ronin’s aggressive styling is complemented with a black metal alloy custom KeyMod hand guard.

The Ronin 10" SBR Upper is a variant based off of the quintessential US SOCOM CQB weapon, the MK18 SBR, which was developed to give SpecOps units the edge in close quarters scenarios. This upper features a 10.5 inch outer barrel with a super sleek and lightweight aluminum KeyMod rail, making it perfect for turning tight corners, yet delivers enough power and accuracy to send rounds across a field.

The Ronin 15" Carbine Upper is just as comfortable in an indoor CQB field as it is at a 3-day outdoor MilSim op, and features a 15 inch barrel setup with plenty of real estate on its sleek, lightweight aluminum KeyMod free float rail. It makes a great alternative to the standard RM4A1/VM4A1, or a PDW setup.

The Ronin 18" SPR Upper is based on the variant of the U.S. miltary’s MK12 SPR, which was created by the Naval Special Warfare Center, Crane Division, specifically for SpecOps units with the purpose of bridging the gap between standard M4s and sniper rifles. The SPR upper gives you the flexibility to swap between your current AEG 2.5/3 setup and the ultimate outdoor AEG. This upper features an 18 inch barrel and a slim, lightweight aluminum KeyMod free float rail, giving you the ability to reach out and dominate your target. With the addition of any mock suppressor, you’ve got the perfect DMR.


  • High strength, full metal alloy construction
  • Variants:
    • Ronin 10" SBR Upper
      • Overall Length: 19.5" / 49.53 cm
      • Rail Length: 10" / 25.4 cm
      • Barrel Length: 10.5" / 26.67 cm
      • Barrel Length (w/ suppressor): 12.25" / 31.15 cm
      • Will come with PTS Flip-Up Sights
    • Ronin 15" Carbine Upper
      • Overall Length: 23.25" / 59.05 cm
      • Rail Length: 15" / 38.1 cm
      • Barrel Length: 15" / 38.1 cm
      • Barrel Length (w/ suppressor): 16" / 40.64 cm
    • Ronin 18" SPR Upper
      • Overall Length: 26.5" / 67.31 cm
      • Rail Length: 15" / 38.1 cm
      • Barrel Length: 18" / 45.72 cm
  • Uses KWA's new rotary hop up unit
  • Comes with a Japanese 6.05mm semi tight-bore inner barrel
  • One-piece, full metal alloy upper receiver
  • Full length monolithic picatinny top rail
  • Modular, ultra-sleek, custom KeyMod hand guard rail system
  • Complete replacement upper receiver kit for KWA Ronin AEG 2.5 / 3 airsoft rifles

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