Now that I almost have my M4 project finished I am starting to look for another Colt pre-ban. I have seen the prices on SP1 rifles start to come down a little and see them quite often around $1000-1100. My only complaint is they all have the original style uppers without the fwd assist. When did Colt start using the fwd assist on their AR-15s, and did they make SP1s this way? I actually want to have one with the LW barrel, FH, A1 upper without the brass deflector and A1 stock.