The Airtech Studios AK47 Hop‑Up Unit Brass Ring (Advanced Inner Barrel Locking Ring) is a precision internal upgrade part for AK‑pattern airsoft AEGs. Designed to replace the stock brass ring or O‑ring that sits between the inner barrel and the hop‑up chamber, this component improves barrel stability, accuracy, and consistency — especially useful if you’re planning on installing an R‑Hop/Flat‑Hop setup.
 
What This Part Is
This isn’t a complete hop‑up unit — it’s a locking ring that fits at the front of the hop‑up chamber where the inner barrel enters the unit. Many stock AK hop‑up assemblies use a simple brass spacer or ring here, which can allow slight barrel movement. The Airtech Studios version gives a snug, secure fit so the barrel stays in true alignment, reducing vibration and helping BBs travel more consistently for better accuracy.
 
Key Features
Replaces Stock Brass Ring: Upgrades the standard ring/O‑ring component to lock the inner barrel firmly in place.
Enhanced Barrel Stability: More surface contact reduces lateral and axial movement, giving a more reliable hop‑up setup overall.
Improved Shooting Consistency: A stable barrel and hop‑up alignment helps BBs travel straighter and with more consistent backspin — especially helpful with high‑end hop mods like R‑Hop or Flat‑Hop.
Tough Construction: Made from a durable polymer that withstands vibration and stress during firing.
Includes Silicone O‑Rings: Often packaged with extra silicone rings to help shim and fine‑tune the fit into your specific hop‑up setup.