This was my previous +bow RSCB war setup:
It's very similar to the setup Koree posted in one of the pinned topics very recently. I put CPVC in the internal bits of PVC to reduce dead space, which, at the very least, did not reduce performance. The ball valve on the end of the clip is attached via a bushing and works very well in a war. I sanded down the very beginning of the barrel as my darts are tight in PETG and this makes them fall slightly further inwards than they would normally, improving performance and decreasing the already slim chance of misfires.
I believe that there is not much that one can do to improve a normal RSCB beyond the internal dead space reduction I have performed and perhaps switching the clip to SCH80 PVC, which Split says made a noticeable shift in his ranges. Badwrench's poppet idea was quite interesting and has merit but quite often I find myself not using a 4B, which would have no problem overcoming the occasional jamming problem with crazy airflow. There are probably ways to improve that design but I thought there were better ways to improve performance.
The best way I could think of improving an RSCB is to instead change the direction in which air flows. The tee in the RSCB couples with the elbow, which basically smashes air against the top of the tee before pushing the dart out of the barrel. I reasoned that airflow entering from an angle would provide at least a small improvement by directing air towards the barrel instead of merely into the system.
I had to buy these online. I haven't seen them in stores. But they do the job perfectly. They are... PVC wyes.
As you can see, it couples with a forty-five degree elbow. The end result is a tee setup that has the same height as a normal elbow/tee setup, which unfortunately means that there innately a little more dead space in this system than in the other one. This can be overcome with methods I haven't performed yet, such as cutting down the attaching parts of the coupling ends.
This is the final product. My +bow is not currently assembled at the moment. This, coupled with the fact that I have no darts, means that qualitative measurements is impossible at this moment. However, my shipment of dartsmithing materials is en route and I am mailing a few of these pieces to Split. I have the utmost confidence that Split and his +pistol can provide quality results, be it in favor of this or the traditional system.
However, I have a few stray darts lying around that managed to make it back from Chicago. Preliminary (and not at all qualitative) measurements using my Frankenfinder tend to favor the BRISC clip to the RSCB when the same piece of PVC is used in the clip and a dart is hand loaded into the barrel for consistency.
I figured that, while this is by no means a completed project, it stands to benefit the NIC as-is. I plan on using one of these in some form at Armageddon on at least my +bow, and probably a few other guns.
Finally, as to the naming, I have the presumption to add myself (Ice Nine) to the Rawray7/ShortShit/CynicalSynapse/3DBBQ group. Through rearrangement I arrived at either BRISC, or CRIBS, or any other number of variations thereof. Even though it was only small, not super thorough preliminary testing, I think there is certainly room for improvement on the traditional RSCB though these wyes.
Edited by Ice Nine, 05 July 2009 - 12:32 PM.