Smith & Wesson has come out with an M&P 15 for their more "budget-minded" customers, dubbed the M&P 15 Sport. It's basically a stripped-down version of the higher end M&P 15T, but there are a few key differences.
First, the chamber and barrel are not chrome lined as they are on the higher-end models, they are melonite lined. This does two things: Increases accuracy, and reduces resistance to rust. The reason most manufacturers use chrome lined barrels is because of it's high resistance to corrosion. Accuracy isn't increased dramatically, you likely won't even notice the difference between this and a chrome lined barrel, but there is a difference, and it is worth mentioning.
Also, the M&P 15 Sport lacks a few features that are common on other models, a forward assist and a dust cover. If you are just looking for an AR15-type rifle for taking to the range once in a while, you won't miss these features at all. The beauty of any AR15 is the ease of replacing parts, so if you really wanted to, you could always replace the upper with another that isn't lacking those features.
Moving to the lower receiver, the only visible difference from the standard AR platform is the lack of an interchangeable trigger guard. This model line has the trigger guard incorporated into the lower receiver, and it is not replaceable, unless you are willing to replace the entire lower assembly. For most, it won't be an issue, but this article is simply focusing on the differences.
The collapsible buttstock appears to be sturdy and of decent construction. It has a standard adjustable A2 style post front sight, and an adjustable rear dual-aperture peep sight. If iron sights aren't your forte, you can always mount an optic of some sort to the accessory rail.
We will be doing a more in-depth review of this rifle in a few short weeks, but until then, we wanted to post another article.
Soon to come on The Low Ready, we will be doing a Range Report on a few weapons you've already read about, and one you haven't. The Beretta 92FS and Springfield XD45 will be there, along with another pistol or two that you haven't seen here yet.
