DS Arms, maker of good (cheap) firearms and accessories has started shipping budget priced .300 AAC Blackout upper receivers. These 16″ uppers, available either with flat black or stainless steel barrels, allow shooters to make the switch to .300 BLK on their existing AR-15 rifles. Uppers do not include bolt, bolt carrier or charging handle, but if you already own an AR-15 then chances are you have one lying around (and thankfully bolts for 5.56 and .300 BLK are interchangeable). $320 for flat black, $335 for stainless steel.
