Description
Laylax Prometheus EG Barrel for AA12/Scar/HK417/M733 (6.03mm – 300mm)
This Laylax Prometheus EG barrel is a 6.03mm tight bore precision inner barrel, 300mm long, made to suit the AA12, SCAR, HK417 and M733-type replicas. It is a straightforward upgrade from a standard inner barrel, designed to give more consistent shots and improved accuracy.
The EG series is Laylax Prometheus’s line of stainless steel precision barrels. Laylax bases the series on Tokyo Marui specification barrels and offers it in a wide range of lengths, so you can pick the exact length your replica needs. The 300mm length suits several replicas, including AA12, SCAR, HK417 and M733 types.
Stainless steel precision
The EG barrel is made from stainless steel rather than the brass or aluminium used for many stock barrels. Stainless steel is hard and resistant to accidental bending, so the bore stays straight even if the front end of your replica takes a knock, and it keeps its accuracy without relying on a coating. The 6.03mm tight bore gives the BB a close, consistent fit as it travels down the barrel.
One barrel, several platforms
300mm is a shared inner barrel length across several popular replicas, so this one barrel can serve owners of AA12, SCAR, HK417 and M733-type replicas. A precision barrel helps produce a more consistent BB path, which makes hop-up adjustment more predictable and helps tighten groups.
Fitting
Fitting means stripping the replica, moving the hop rubber onto the new barrel and reassembling. When you fit your hop rubber, check that it seats correctly in the hop window and that the nub lines up, as some hop rubbers and nubs fit differently from barrel to barrel. If you are unsure, ask a technician to fit it for you.
Key features
- Laylax Prometheus EG precision inner barrel
- 6.03mm tight bore
- Stainless steel construction
- 300mm length
- Made to suit the AA12/Scar/HK417/M733
- Resists bending and keeps its accuracy
- Made in Japan
Compatibility
Made in the 300mm length for AA12, SCAR, HK417 and M733-type replicas. Different makers’ versions of these replicas may use different barrel lengths, so measure your current barrel before ordering.
Before buying, measure your current inner barrel or check your replica’s manual, as length is critical: a barrel that is too long can protrude beyond the outer barrel or flash hider, and one that is too short may leave the BB unsupported in the outer barrel. Check that your hop-up unit and rubber are compatible with a standard Tokyo Marui-type barrel.
Care and maintenance
Before fitting, run a cleaning rod with a soft patch and a drop of silicone oil through the bore, then dry it so no oil reaches the hop rubber. After that, clean the barrel every so often, or whenever accuracy drops off, by pushing a dry or very lightly oiled patch through from the hop-up end. Always use good quality, seamless 6mm BBs, and never fire dirty or damaged BBs, which can scratch the bore or jam in the hop-up.
Who is it for?
A practical upgrade for AA12, SCAR, HK417 and M733 owners who want a precision stainless steel barrel in a 300mm length.
Please note: Fitting an inner barrel requires partial disassembly of your replica. Check your site’s power limits after any internal change, and always wear eye protection.
