Prometheus Stainless Steel 6.03mm EG Tightbore Inner Barrel — R-HOP Installed by LayLax (433mm)

Take your AEG’s accuracy, range, and consistency to the next level with the Prometheus Stainless Steel 6.03mm EG Tightbore Inner Barrel — professionally fitted with a LayLax R-HOP and finished to competition-grade tolerances. At 433mm length and machined from high-quality SUS 304 stainless steel, this barrel is built for players who demand repeatable performance, tighter groupings, and a more reliable shot-to-shot trajectory.

Why this barrel matters

Stock inner barrels and basic hop-up setups leave performance on the table. The Prometheus 6.03mm tightbore minimizes the air gap around the BB, preserves pressure, and reduces wobble — all of which translate to cleaner, more stable flight. When combined with a professionally installed R-HOP by LayLax, you get the best of both worlds: the mechanical precision of a tightbore and the extended backspin control of a finely tuned hop patch. The result is superior range and consistency that’s obvious on the chrono and in target groupings.

Precision engineering & materials

• Material: SUS 304 stainless steel for durability, corrosion resistance, and dimensional stability.

• Bore: True 6.03 mm inner diameter, precision machined to tight tolerances.

• Length: 433 mm — ideal for mid-to-long barrel builds (DMR, precision field rifles).

• Finish: Polished internal bore for minimal friction and smooth BB travel.

Stainless steel resists flex and micromovement better than many alloy or carbon barrels, keeping your barrel concentric and your shots consistent over long sessions and variable weather.

LayLax R-HOP — installed and tuned

This barrel ships with a precision-fitted high-density rubber R-HOP patch expertly installed in the hop window and sanded flush with the bore. R-HOP technology improves air seal and maximizes backspin by making the contact patch integral to the bore surface. Key benefits of the LayLax R-HOP installation:

• Improved air seal — less blow-by around the BB, more consistent FPS.

• Stabilized projectile flight — better BB contact yields predictable trajectories.

• Higher tolerance for BB inconsistencies — compensates for slight weight or shape variance in BBs.

• Superior peak backspin — extended, consistent hop for greater range and accuracy.

This is a custom R-HOP installation — professional setup and proper bucking (flat-hop compatible) are strongly recommended to get the full advantage.

Performance you can rely on

Prometheus tightbores are favored by competitive players because they deliver measurable improvements in:

• Tighter groupings at distance

• More consistent FPS and shot-to-shot spread

• Improved long-range accuracy when paired with quality hop components and BBs

The 6.03mm bore is a popular sweet spot: narrow enough to maximize air efficiency and accuracy, yet wide enough to tolerate standard quality BBs when used with a correct flat hop/bucking setup.

Important notes & care instructions

• Custom product: This is a custom inner barrel assembly — original replaced parts are not included.

• Installation: Professional installation and tuning recommended. Misaligned R-HOP patches or incorrect buckings can negate benefits.

• Bucking requirement: Use with a flat hop compatible bucking or properly modified bucking for best results.

• Maintenance: Clean and inspect the R-HOP patch regularly; take care during cleaning to avoid damaging the rubber patch.

• Warranty: Warranty covers manufacturer defective properties only — care and installation are owner responsibilities.

Who this is for

Serious skirmishers, MilSim competitors, and DMR builders who want a no-compromise barrel upgrade. If you want sharper groups, more consistent long shots, and a barrel that handles a tuned hop system properly, the Prometheus 6.03mm with LayLax R-HOP is engineered for you.

Manufacturer: Prometheus / LayLax
Model: Prometheus 6.03mm EG Tightbore Inner Barrel, R-HOP installed (433 mm)

Upgrade smart: pair this barrel with quality BBs, a correct flat-hop/bucking setup, and professional installation to unlock its full potential.