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Manufacturer: Tanio Koba (Japan)
Type: Inner Barrel
Tanio Koba – Hop Twist Barrel Advert
I purchased a KSC MK23 used, and it was in great need of repair/upgrade. One of the things I upgraded was a Zeke Metal Slide/Outer Barrel setup which I also bought second hand.
Tanio Koba – Hop Twist Barrel – "Rifling" Closeup
One thing I did learn about the Zeke Metal Barrel setup is there is no way to re-install the KSC hopup system.
Tanio Koba – Hop Twist Barrels
So thinking the Tanio Koba Hop Twist barrel was rifled I got 1 to solve my no hopup prob.? Well it didn't.. Made everything worse.? BB's fly EVERYWHERE.??My pals at First Factory ended up setting me straight.
Tanio Koba – Hop Twist Inner Barrel
Tanio Koba Hop Twist Barrels work. But they have to be used in conjunction with your Hop-Up ON and on sub 350 fps guns.
Your bb still backspins from the hop-up, and the twists in barrel act as an air "cushion" around the bb, "centering" it more down the barrel.? While it doesn't seem to add too much FPS, it does seem to make your bb's flight path more consistent. Over 350 fps guns, the sprialing air tends to effect the hop-ups backspin.
We've tested on TM M14's.? We kept the internals stock and just added the barrels.? Sample results on the M14 were a fps increase from 319 – 325 (Not that much more then stock).? But groupings of shots seems to be tighter.? We also tried on APS Type 96's, but they were harder to gauge since they are spring snipers, and you always seem to pull off target when cocking them.? Problem with running accuracy tests, is the are pretty subjective.