Re: Bushmaster O.R.C.
Is that $729 before or after applying the coupon. If it is before applying the coupon, then an ORC for $629 would be a good deal. If it's after the coupon, then getting an ORC for $729 isn't such a great deal. All the ORC means is that you aren't getting any sights with the rifle and don't have any means of attaching them because you're getting a left over, chopped down gas block that you can't attach a front sight to.
For reference, you can get a Spike's mid length for $859, but you get a front sight tower, mid length gas system, a Spike's ST-T2 buffer, mil spec buffer tube and mil spec bolt/carrier group. If $120 or so means that much to you, then the Bushy may get you shooting sooner, but it isn't as good a deal as it may seem to be.