These are a standard bolt motion rifle and there won't be any genuine earth shattering new developments on these steps. These are easy, solid sufficient and operate. The bolts have some smaller flutes on them to help with preventing grit and grime problems and there are also three gas ports https://weatherbyvanguard223revie79146.webdesign96.com/27132247/how-much-you-need-to-expect-you-ll-pay-for-a-good-weatherby-vanguard-223-review