What is ECM rifling?
Electro Chemical Machine. This is a state-of-the-art rifling technology used on all the finest barrels, rifles and pistols alike. The rifling is actually created using laser rifling, which is accurate to within +/- 50 millionths of an inch. The result is an incredibly smooth and consistent lands and grooves finish. These barrels are more accurate then their counterparts, such as button or broach cut rifling.