Prometheus – 6.03 R-hop EG Steel Inner Barrel


prometheus r-hop barrel: The R-hop is the absolute best upgrade for any gun to achieve maximum accuracy, range, and consistency for your trajectory. The Prometheus barrel combined with the R-hop professionally made by Hop Systems will give you amazing results that will surpass anything you’ve seen before

R-hop products are custom made and tested to perfection, please allow 1 week for labor time and shipping. Orders will ship early most of the times.


Flat Hop Up Unit

Customize your own RHOP Drop-in kit. Add a Flat-hopped hop up chamber and the correct matching bucking with the R-hop barrel of your choice. All orders will come pre-assembled into a drop in r-hop kit.

Flat-hopped Bucking

A Flat-hopped bucking is required with the R-hop barrel. You can purchase one with your R-hop barrel, or combine it with the matching hop up chamber to make a Drop-in R-hop Kit.

Barrel Lapping

Lapping will add 2 weeks lead time for labor.

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prometheus r-hop barrel

About the R-hop barrel: The RHOP barrel is the best trajectory performance enhancement for any airsoft gun. It improves your accuracy, range, consistency, durability, and more. It also allows the effective and efficient use of heavier bbs. A perfectly installed r-hop is the best trajectory upgrade that will surpass all other systems. Hop Systems promises a perfectly installed r-hop that will give you the best shot consistency and trajectory straightness. With the R-hop, you will be able to hit your targets more often, reach farther, and effectively use heavier bbs.

About the Inner Barrel: The Prometheus R-hop barrel is our top recommendation for most players; they come with a low price for great performance. The Prometheus barrels is one of the best tightbore barrels on the market. They are manufactured in Japan with the highest tolerances and the best quality control. They also use a superior SUS304 stainless steel for their Prometheus EG barrels. From our experience, they are one of the most concentric and straight barrels on the market.

Requirements: You will need a flat-hopped bucking and ideally a sorbo flat hop nub or m-nub to install with your r-hop barrel ( You can still use the stock soft nub with great performance if you can’t use a soft flat nub ). You can find both items in our product options. Any errors in modification and installation can negatively affect the performance of the r-hop; Therefore, professional installation is recommended. For performance assurance and to save you the time and hassle of modifying the parts yourself; You can purchase an R-hop Drop-in Kit, or send in your hop up parts to us for professional installation and modification. Using high-quality heavy bbs is ideal for performance; 0.25g is good, 0.30g and up would be perfect. The heavier the bb, the better your accuracy, consistency, and range will be.

  • Professionally installed and tested before shipment
  • Comes with an extensive instructional manual for the r-hop.
  • Lifetime warranty: covers manufacturing defect only.

Compatibility: For Airsoft AEGs

Additional information

Barrel Length

110mm, 135mm Krytac SDP (+$15), 141mm, 155mm Krytac PDW & Vector (+$15), 185mm, 208mm, 229mm, 247mm, 260mm, 275mm, 280mm Krytac CRB & LMG (+$15), 285mm, 300mm, 310mm Krytac LVOA-S (+$15), 318mm, 363mm, 380mm, 387.5mm Krytac LVOA-C (+$15), 407mm, 416mm Krytac SPR (+$15), 455mm, 469mm, 509mm, 550mm, 590mm, 650mm

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