yes but they are really expensive. DB Custom makes them too, here is some info about them. Id get this barrel for my M14 and order it to Airsoft GI.
Quote:
6.01mm Tight Bore Inner Barrels
Available from MP5K to AK47 length, the improvements in accuracy and range will impress even the most seasoned player. With our new inner barrel in a stock Classic Army M15A4 carbine (14.25" length) we have velocity improvements of 20-25 feet per second and accuracy improvements of 2-3" groups at 25 yards, with the hop-up unit turned off! Use in actual games and events has shown increased range of up to 1/3 more then stock!
Also available in specific models of gas operated Airsoft replica, the improvements in velocity are just staggering!
In a stock Tanaka M40A1, using green gas and firing 0.34g BBs, we had an improvement of 56 fps! Imagine going from 529 fps to 585 fps simply by changing your inner barrel? The end result has been used in multiple games and target shoots by our staff to test it and has been able to hit man sized targets past 100 yards with consistency.
The new inner barrel made for the Tokyo Marui Hi-Capa 5.1 has shown velocities of 330-338 fps in a stock pistol with green gas and 0.20g BBs and over 350 fps with high flow valves installed.
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All barrels are guaranteed within 0.0015 of total run out or better, which insures you the straightest barrel possible for the most accuracy potential out of your Airsoft replicas
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