Lambda "SMART .03" Precision Carbon Steel 6.03mm Tight Bore Inner Barrel for Tokyo Marui Spec AEGs
(Length: 509mm)

"Got the 128mm version for a tiny m4 pistol build, and it is surprisingly accurate and consistent for such a short barrel. The range isn't crazy but that's to be expected with shorter barrels, but it was very accurate and consistent within it's range. It's also a great price for the quality you get. Definitely recommend.

"Great Quality barrel, for being a Japanese steel product it is cheaper than other options. I have the 595mm length and its current installed in my SRS. And being a bullpup, the barrel only sticks out an inch from the outer barrel.
Regardless, it’s a great barrel and worth getting. I have bought a few different Lambda branded barrels and they have all be consistent with the crafsmanship and quality.

"These is a solid inner barrel for the price. I got the 303mm version and it shoots lasers. Be advised it has a slightly larger outer diameter than your brass barrels (Only by a few nanometers). They'll still fit in your hop up and outer barrel but it will be slightly more snug but nothing to worry about.