You could get the same thing for $200 less, but you'd have to send Agency Arms your slide and be without it for 10 to 15 weeks. Also I'm pretty sure you'd get it with no sights, since its hard to reuse them after pushing them out, so you'd have to spend some on that. Just buy it in store here and get some slide parts to put together a whole new slide. I just reused by barrel. The provided recoil spring is 3rd generation, but they provide a spring adapter for the Gen4, it fits really tight so get a nylon hammer ready.