How would you rank the following AR-15's and why?
Colt A3 Tachical Carbine 6271
Sig Sauer 516 Patrol Carbine
Smith & Wesson M&P 15 Sport II
Colt A3 Tachical Carbine 6271
Sig Sauer 516 Patrol Carbine
Smith & Wesson M&P 15 Sport II