Prometheus - 6.03 R-hop AK Drop-In Kit Assembly

Prometheus - 6.03 R-hop AK Drop-In Kit Assembly - Hop Systems

Prometheus - 6.03 R-hop AK Drop-In Kit Assembly

The R-hop Drop In Kit is the fastest way to enjoy the benefits of the R-hop and start hitting your targets. Just drop it in and play, with no hassle and labor involved on your end.  Yup, we just did everything for you and only used the highest quality parts and installations. Each kit has performance assurance, all kits are tested before shipment and all parts are assembled by our professional technicians and ready to play out of the box.

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.


The R-hop Drop-in kit is an easy to install upgraded drop in setup for your airsoft gun. The fastest way to enjoy the benefits of the Rhop without all the hassle and labor. Just drop in, adjust hop, and play, with no work involved on your end. Our Drop in kits have a performance assurance; all kits tested before shipment. All parts are assembled by professional technicians and are ready to play out of the box.


The R-hop 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.


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.

Included in the R-Hop Drop In Kit

Inner Barrel: Prometheus - 6.03mm R-hop Stainless Steel Tightbore Barrel
Hop up chamber: Lonex - AK One-Piece Metal Hopup Chamber
Service: R-hop Complete Package Service
Bucking: Lonex Flat Hopped Bucking
Hopup Nub: M-nub Installed

Compatibility: For AEG, HPA Platforms. For M4 / M16 / SR-16 / M4-RIS and other compatible Airsoft models that uses M4 hopup units.

All R-hop drop-in kits come with a Lifetime Warranty 😎

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