The AR15 upper receiver is often the starting point when building the upper half of an AR style pistol or rifle. Do you use a billet or forged upper? Do you wish to run a forward assist on your AR15 or do you prefer a slick-side / low profile? You can even decide to run a side-charging upper. Regardless what you decide, we've got the upper receiver for you, priced to sell and backed by a satisfaction guarantee.