Evil Pipe, Barrel Kit (Custom 98 threaded).
Other stuff that does not have to do anything with this barrel plug.
Shorter than Lapco's
Some Custom 98 threaded barrels can not be used with it.
I bought this adapter, since its the next most available one after Lapco's adapter. I love my Lapco adapter, its been working fine for me so far. Two things that I really hate about it, is that it adds a good inch and a half to the overall length of the barrel. And that the ball has to travel through that inch by itself, before it actually gets into the barrel. I'm just too paranoid about accuracy of my marker. I always think that the adapter might mess up the trajectory, friction, etc one way or another.
That is why I decided to try this adapter, since its much shorter, and the ball gets straight into the barrel, by being pushed through the adapter by the bolt of my marker.
The barrel-adapter came in, I switched my Lapco adapter with this one, it was looking good. It protruded out of my marker by about half an inch and sat very solidly.
I got my barrel kit, and started to screw in one of the backs. after about one turn the barrel couldn't go in any further, it would start grinding against the threading. After trying ALL of my barrel backs (5 of them), none of them fit into this adapter, and I scratched some of the threads quite a bit, by just trying to screw them into the adapter. If they had a finer threading, like most barrels do, there is a good chance that I would have damaged threading to a point where I wouldn't be able to use them in ANY adapter.
I borrowed my friend's barrel (JT something) which is also custom 98 threaded, and tried it on. It would screw in almost fully, but at the end it started to grind against threading as well, and I didn't want to force it in, since it would have scratched the threads on the barrel quite a bit.
For me personally.... waste of money.
I have JCS's Gold Power Tube, and Rear Velocity Adjuster, and both perform quite well, but this barrel adapter was a total bust. If I receive a new barrel adapter from them, and if it works, I will change this review based on the performance of the new one.
I believe both my barrel and my JCS adapter are the new 98 Threaded. I will contact the store from which I bought my adapter and ask them which threading it was supose to be, just to make sure. As far as I can tell from just comparing the threading of JCS adapter and my Lapco adapter, they are pretty much the same. And I know that my Lapco adapter has new Custom 98 threads.