I have two different uppers that you may interest you.
1. Bushmaster 24 inch V-match (this is a complete upper). Very accurate, dime sized groups with Hornady 55 gr Varmint ammo. Just add you own scope. $450.
2. Bushmaster 20 inch Stainless Steel DCM upper. This is the competion barrel with the free float handguard. The A2 upper does not have the target sights (it does have the standard issue sights). This package comes with the bolt, however, no bolt carrier or charge handle. $400.
If you need more info E-mail me at firstname.lastname@example.org