ya my friend has one on his mag. when he chopped, the only way to get the paint out completely was to go to a sink and, that rifling didn't do anything special either. there is also the Smart Parts rifling, which uses air. This is used on the All American, which is one of the best barrels on the market.
Autococker 2000, LAPCO aluminum Bigshot, 68ci 4500psi Raptor Rex nitro tank with runtee, gauge and slide valve, kapp drop zone II, macroline kit