Tippmann made a thread improvement change on their 98 markers. This adapter works any direction with any properly threaded 98 barrel. Basically, if you try a new 98 barrel thread in an older (pre serial number 495,000) it may not work. This adapter provides the minimum material needed to accurately make the connection without any decline in accuracy. Black anodized aircraft aluminum. Guaranteed to work with GTA products from Tippmann. We do not test all products from all manufacturers.