DSA Arms .300 AAC BLK Upper Posted November 25, 2011 in AR-15, Rifles by Steve Johnson with 5 CommentsTags: .300 blk, ar, ar-15, rifle, rifles DSA Arms is now offering a .300 AAC BLK upper receiver for the AR-15. 416 Stainless model. The uppers do not include a charging handle, bolt or bolt carrier. The price is $335 for the stainless barreled model or $320 for the carbon steel barrel model. Win a Kel-Tec PMR-30 !!!