I am looking into getting another AR but one for a little distance..(100-600 yards). I dont want to break the bank on the rifle but dont want to go cheap either. I was thinking of a DPMS mini-SASS. I like the 18" heavy barrel and the PRS stock. I had a DPMS 308 SASS and loved it. I also thought of going with the DPMS A3 flattop upper with SS 20" bull barrel and getting a different lower with the PRS stock and trigger later. Would the A3 20" SS upper be a good choice? It is chambered in .223 and is a 1/9 twist. I am shooting 55 gr. ammo. The mini-SASS is chambered in 5.56 and is 18" heavy barrel with a 1/8 twist. I am looking for the best accuracy I can get and I have a 1/9 twist heavy barrel on my other AR and get great accuracy with the 55 gr. ammo. What are your thoughts? I would really like to purchase a complete upper/barrel assembly and get a lower and stock sepeatly.....unless I can find the complete package....or complete mini-SASS. Any info is greatly appreciated.