Modern sporting rifles, especially those designed on the AR-15 pattern, have become the most popular centerfire rifles in the U.S., and for good reason. Virtually everyone is making ARs these days. This is great, but to a new buyer, the choices can be overwhelming. We’ll take you through the various options available on today’s ARs and help you find the features that are right for your needs.
- <h2>Receivers</h2>The vast majority of receivers found on factory ARs are flat-top Mil-Spec uppers and lowers constructed from 7075 T6 aluminum. Unless you’re looking to replicate the look of the original <a href= "http://www.gunsandammo.com/reviews/range-m16a1-review/" target= "_blank">M-16</a> or know for certain that you’ll never mount an optic, the flat-top design is preferable over the carry-handle style upper receiver. <br></br> Some makers, like <a href= "http://www.hmdefense.com/" target= "_blank">HM Defense</a> in Ohio, CNC machine their receivers from aluminum billets, which allows them to sculpt the parts with unique aesthetic lines and features.